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Author Topic:   The Origin of Novelty
bluegenes
Member (Idle past 2506 days)
Posts: 3119
From: U.K.
Joined: 01-24-2007


(1)
Message 182 of 871 (690980)
02-18-2013 5:10 PM
Reply to: Message 178 by mindspawn
02-18-2013 3:45 PM


mindspawn writes:
Associating the observance of some chemical processes with the sudden appearance of biological life is just ridiculous.
Why is it ridiculous to point out that chemical phenomena are formed by chemical processes? Do you know of any exceptions? Why is what we can readily observe ridiculous?
mindspawn writes:
Unfortunately for your argument, its pretty obvious that you are clutching at straws.
Obvious to whom?
mindspawn writes:
I was expecting a more civil discussion about evidence for coding genes, instead we are being distracted by side issues.
The discussion is perfectly civil on my part. I thought you were aware of the examples of novel protein coding genes that I gave on the peanut gallery. There was one in the Douc Langur monkey and one in an Antartic fish. They are paralogs. I'll repeat them here if you really want me to when I've got time.
mindspawn writes:
To the outside observer, both of us are claiming my pet theory is better than yours. Its a subjective argument, let's just move on from there.
There's nothing subjective about pointing out that natural processes are the best explanation for natural phenomena. The conclusion is based on observations we can all make.

This message is a reply to:
 Message 178 by mindspawn, posted 02-18-2013 3:45 PM mindspawn has not replied

  
bluegenes
Member (Idle past 2506 days)
Posts: 3119
From: U.K.
Joined: 01-24-2007


Message 183 of 871 (690982)
02-18-2013 5:52 PM
Reply to: Message 178 by mindspawn
02-18-2013 3:45 PM


Novel protein coding gene in an Antarctic fish
[Copied from the peanut gallery on mindspawn's great debate].
There are various theoretical models of how gene duplications can produce new function, and there's considerable evidence that this can happen in several different ways.
One interesting way is the "Escape from Adaptive Conflict" model, known as "EAC". This is based on the fact that some genes perform more than one function. This could hypothetically cause "adaptive conflict", because the ideal allele for one function may not be the same as the ideal for the other. Duplication of such genes, says the theory, could lead to subfunctionalization of each paralog, and to enhanced or new function as each copy of the gene is free to perform only one of the original functions, thus ending the conflict.
Here's a recent research paper which presents very good evidence of an example of neofunctionalization arriving in this way.
Abstract
Article based on paper
quote:
Abstract
The evolutionary model escape from adaptive conflict (EAC) posits that adaptive conflict between the old and an emerging new function within a single gene could drive the fixation of gene duplication, where each duplicate can freely optimize one of the functions. Although EAC has been suggested as a common process in functional evolution, definitive cases of neofunctionalization under EAC are lacking, and the molecular mechanisms leading to functional innovation are not well-understood. We report here clear experimental evidence for EAC-driven evolution of type III antifreeze protein gene from an old sialic acid synthase (SAS) gene in an Antarctic zoarcid fish. We found that an SAS gene, having both sialic acid synthase and rudimentary ice-binding activities, became duplicated. In one duplicate, the N-terminal SAS domain was deleted and replaced with a nascent signal peptide, removing pleiotropic structural conflict between SAS and ice-binding functions and allowing rapid optimization of the C-terminal domain to become a secreted protein capable of noncolligative freezing-point depression. This study reveals how minor functionalities in an old gene can be transformed into a distinct survival protein and provides insights into how gene duplicates facing presumed identical selection and mutation pressures at birth could take divergent evolutionary paths.
Paralogs are identified by sequence similarity. Many paralogs with differing functions have been identified in many different species. Mindspawn faces the daunting task of demonstrating that all of these genes which look like functional coding paralogs are actually not (which is essentially what he is claiming).
When something looks like a duck and quacks like a duck, the default is that it's a duck. The onus is not actually on RAZD to show that apparent ducks (or paralogs) are what they appear to be, but on mindspawn to support his extraordinary claim that they are not what they appear to be.
Rather him than me!
Note the significant added function of the new gene described in the article. "Unlike the SAS enzymes, which remain inside the cell, the AFP III proteins are secreted into the blood or extracellular fluid, where they can more easily disrupt the growth of invading ice crystals."
Hey! I've got a nifty neofunctional protein coding paralog that keeps me warm.

This message is a reply to:
 Message 178 by mindspawn, posted 02-18-2013 3:45 PM mindspawn has replied

Replies to this message:
 Message 197 by mindspawn, posted 02-20-2013 8:20 AM bluegenes has replied

  
bluegenes
Member (Idle past 2506 days)
Posts: 3119
From: U.K.
Joined: 01-24-2007


(1)
Message 199 of 871 (691090)
02-20-2013 9:07 AM
Reply to: Message 197 by mindspawn
02-20-2013 8:20 AM


Re: Novel protein coding gene in an Antarctic fish
mindspawn writes:
There's two SAS genes, and two antifreeze genes. Scientists noticed that some sections in the SAS genes look like some sections in the antifreeze genes. These are the facts. From then on these researchers interpret the facts according to evolutionary theory, without any backup evidence for their conclusions.
Scientists assume that what looks like paralogs are paralogs. They assume that the known process of gene duplication is responsible for pairs of genes that look exactly as if they are the results of that process. They assume that what looks like a frog is a frog, produced by the processes known to produce frogs.
Now, would you like to demonstrate the existence of another process that produces apparent paralogs
or apparent frogs?
mindspawn writes:
Their conclusion would be more believable if they proved that the organisms with the antifreeze genes came exclusively from a population that only had the SAS genes, unfortunately its only an assumption on their part that the antifreeze genes came from the SAS genes, based merely on similarity of sequences.
Merely. Would you like to describe another known process other than duplication by which genes which appear to be duplicates can appear in the genome of a species. A known process.
And having done that, as it's your claim that all apparent parologs in genomes aren't paralogs, how are you going to set about showing that this is true?

This message is a reply to:
 Message 197 by mindspawn, posted 02-20-2013 8:20 AM mindspawn has replied

Replies to this message:
 Message 211 by mindspawn, posted 02-20-2013 12:47 PM bluegenes has replied

  
bluegenes
Member (Idle past 2506 days)
Posts: 3119
From: U.K.
Joined: 01-24-2007


Message 200 of 871 (691100)
02-20-2013 10:45 AM
Reply to: Message 193 by mindspawn
02-20-2013 7:48 AM


mindspawn writes:
Could you kindly post your evidence for your claims please.
Yes. But only if you accept that the greatest diversity being outside the Middle-East falsifies your model.
mindspawn writes:
Are you claiming that diversity of haplogroups are not directly related to genetic diversity?
Yes.
mindspawn writes:
I didn't understand your points here. The map showed the widest range of haplogroups in the Middle Eastern/Asian region.
Try. Find out where the greatest genetic diversity is in the world.

This message is a reply to:
 Message 193 by mindspawn, posted 02-20-2013 7:48 AM mindspawn has not replied

  
bluegenes
Member (Idle past 2506 days)
Posts: 3119
From: U.K.
Joined: 01-24-2007


(1)
Message 490 of 871 (691688)
02-24-2013 6:34 AM
Reply to: Message 211 by mindspawn
02-20-2013 12:47 PM


Re: Novel protein coding gene in an Antarctic fish
mindspawn writes:
What "known process of duplication?
The observed fact that duplication is a real phenomenon.
Duplication produces damage or is neutral according to actual current observations.
No. Duplication can be detrimental, neutral or advantageous according to actual current observations. Message 35
And "neutral" on arrival is all that would be required for subsequent neofunctionalization.
You should be able to see that if child is born with a duplicate of CCL3L1, it has a potential advantage. Duplication of FCGR3B and AMY1 could also be advantageous if the individual has inherited low copy numbers. Therefore, you can figure out that there are known circumstances in which duplications can be advantageous. Also, with AMY1, you can see that duplication could be either advantageous or neutral depending on environmental circumstances and the number of copies already present in the individual in whom the mutation happens.
There are other examples. Pfmdr1 amplification is known to be advantageous for the malarial parasites in developing drug resistance.
Gene duplications can go to fixation in populations if they are advantageous or neutral, like all other mutations.
To base a "known process" on the circular reasoning of evolution makes no sense, nothing at all.
There's no circular reasoning in direct observation of both present day duplications and of historic duplications.
mindspawn writes:
bluegenes writes:
Would you like to describe another known process other than duplication by which genes which appear to be duplicates can appear in the genome of a species. A known process.
Its no process, its the appearance of baramins, as opposed to the chemical appearance of a common "bacterial" ancestor.
So, you don't know of a process that would produce apparent paralogs other than duplication. Go for the best explanation, then.
We both believe in this sudden appearance of life, and subsequent evolution. Which view does the Antarctic Fish favor?
You mean its anti-freeze gene? Evolution by gene duplication. The two genes look exactly as they should if that were the case.
If you know of one process and only one process by which a phenomenon can be caused (two nearly identical genes in the same species in this case), then the best explanation for historical examples is that they were formed by that known process.
mindspawn writes:
Have you got any biological reasons to favor the evolving of paralogs over the appearance of a baramin?
Of course. Evolution is a demonstrably real process in biology. Gene duplication is a demonstrably real process in biology. Supernatural beings making things is not a demonstrably real process. Supernatural beings creating whole organisms like fish is not a demonstrably real process.
I think you might be confusing creationist arguments about paralogs with creationist arguments about orthologs. Orthologs are similar genes in different species. That might be why you keep saying that we're assuming "evolution" (meaning speciation and common descent) in order to prove it.
Paralogs could exist in your model of created kinds, because they could occur and go to fixation within one species, although on your time scale of 6,500 years there are unlikely to be that many.
Orthologs could only exist in your model to the extent that you accept speciation. You presumably wouldn't accept them as such in anything excepting closely related species that could be regarded as the same "kind".
What you should be arguing, in order to fit what we observe in genomes into your 6,500 year model, is that gene duplication followed by neo-functionalization can happen very quickly and frequently, and can go to fixation very quickly. You also need to argue that neutral and positive copy number variation can happen by both duplication and deletion, and can go to fixation quickly in groups.

This message is a reply to:
 Message 211 by mindspawn, posted 02-20-2013 12:47 PM mindspawn has replied

Replies to this message:
 Message 492 by mindspawn, posted 02-24-2013 3:13 PM bluegenes has replied

  
bluegenes
Member (Idle past 2506 days)
Posts: 3119
From: U.K.
Joined: 01-24-2007


(1)
Message 506 of 871 (691779)
02-25-2013 11:56 AM
Reply to: Message 492 by mindspawn
02-24-2013 3:13 PM


Re: Novel protein coding gene in an Antarctic fish
On the subject of duplication:
mindspawn writes:
Yes its real. It often kills or maims if the duplication is coding. I still am waiting to see examples when it does not kill or maim when both copies code for proteins.
You haven't looked. There are plenty of examples of situations in which duplication can be advantageous or neutral on arrival. One of the things you could do to test this is to artificially duplicate genes in certain environments, and measure the effects on fitness. It's been done in E. Coli, and the researchers found 115 cases in which amplification alone could increase fitness in toxic environments. In most strains, there was no loss of fitness in the absence of toxins (the duplications would then be neutral).
mindspring writes:
Regarding Message 35, have you ever thought that high copy numbers could have been present and yet rare before these studies showed their favorable selection?
Yes. I was waiting for you to suggest it.
mindspawn writes:
Deletions could have been selected and become dominant due to lack of need of high copy numbers, however the high copy numbers become selected for and dominant when the need arises again to have the high copy numbers. How do you know that these are duplications from low copy numbers rather than deletions from high copy numbers?
Both can happen. Think of AMY1 in humans. Here's what's interesting for you. You say:
Deletions could have been selected and become dominant due to lack of need of high copy numbers..
That would be drift. It's a slow process. If you want a model of humans beginning 6,500 ya with the maximum known number of copies (15) so as to avoid any duplication, then you need a much higher mutation rate than we actually have, coupled with some positive selection on a decrease in AMY1 copies. You'd have the same problem with building up the number of copies by duplication on that time scale.
mindspawn writes:
Well the two genes also look exactly like they
were created that way, so your "looks like" argument does not favor evolution in any manner, you will need to come up with something better than that. Two similar sequences speak of an intelligent designer.
No. The chances of an intelligent designer using an antifreeze protein encoded by a gene that looks like a duplicate of another are slim, given the options available. There are many other antifreeze proteins already in the life system, and our knowledge of artificial proteins indicates that the overwhelming majority of potential functional proteins are not even used in the life system. Evolution is constrained in what it can do in a way that designers aren't. The designer would have to be trying to make it look like evolution.
You're still arguing that what looks like a frog could be something other than a frog. When you see an individual apparent frog, do you assume that it came about from the transformation of frogspawn into a tadpole, then a frog, or do you think it equally likely that it could be a Prince magicked into an apparent frog?
Don't you understand that duplication events can be "read" on genomes, and that they happen regularly in labs?
mindspawn writes:
Forget the supernatural beings argument of yours,
I'd be happy to, but you keep implying that supernatural beings can make things without presenting a single known example of this actually happening. It's a bit like having a conversation with someone who claims that kangaroos can speak French, but who cannot present any positive evidence of kangaroos speaking anything, let alone a human language, let alone French. Not quite, though, because at least that person could demonstrate that kangaroos exist!
.. . abiogenesis is really dumb,....
No. Natural explanations for natural phenomena aren't dumb. They are "plausible and realistic", as Bolder-dash would say. And just what he asks for in the O.P.
.......its like a rockfall instantly creating a perfect castle, the chances of nature instantly producing 3 million base pairs in perfect order for beneficial protein coding is ..........a joke.
I agree. What's that got to do with abiogenesis?
A bad joke.
Well, you made it!
So forgetting the dumbness of abiogenesis, compared to the "supernatural beings" view, and looking at actual evidence the fish looks like its a baramin that is well designed with separate genes showing some matching sequences, this is exactly what an intelligent designer would do, duplicate good designs, and make slight adjustments when necessary. So looking at the icy fish genome does not favor evolution.
See above. And the original gene was not a good design for anti-freeze, hence the positive selection on the duplication.
BTW, are all Zoarcid fish one Kind, in your opinion? And if so, what sort of environment do you think they were created to be in?

This message is a reply to:
 Message 492 by mindspawn, posted 02-24-2013 3:13 PM mindspawn has replied

Replies to this message:
 Message 546 by mindspawn, posted 02-27-2013 7:23 AM bluegenes has replied

  
bluegenes
Member (Idle past 2506 days)
Posts: 3119
From: U.K.
Joined: 01-24-2007


(2)
Message 541 of 871 (691970)
02-26-2013 4:43 PM
Reply to: Message 537 by Bolder-dash
02-26-2013 3:27 PM


Plausibility and Realism!
Bolder-dash writes:
....because your side is being defeated so poorly.
In a sense, you're nearly right. So "poorly" that "our side" isn't even being challenged. Your problem is that processes like mutation, selection and drift are demonstrably real. What you need to do in order to catch up with us is demonstrate the reality of your process, which is supernatural beings making things in general and biological features in particular. When are you going to start this attempt?
Bolder-dash writes:
For Darwinian evolution to be true, you need mutations that are !. 1.Random. 2. Sporadic in that they can occur anywhere. 3. Occur often enough to incur evolutionary change. 4. They need to not destroy the organisms in the process.
For Creationism to be true, you need a supernatural being or beings that are 1. Demonstrably real. 2. Can make things. 3. Can and do make biological features 4. Can and did make all the complex features of all the organisms.
We can demonstrate my 1,2 and 3 directly in the lab on behalf of the processes of mutation, selection and drift. You're asking us for detail on "4", which is historical, and cannot be directly proven. Yet you cannot even present a jot of evidence for 1,2 and 3 on behalf of your process, let alone dream of approaching 4.
So, in your O.P. you ask for explanations to be plausible and realistic. We are clearly winning hands down on both realism and plausibility, aren't we?

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 Message 537 by Bolder-dash, posted 02-26-2013 3:27 PM Bolder-dash has not replied

  
bluegenes
Member (Idle past 2506 days)
Posts: 3119
From: U.K.
Joined: 01-24-2007


(1)
Message 588 of 871 (692156)
02-28-2013 10:24 AM
Reply to: Message 546 by mindspawn
02-27-2013 7:23 AM


Re: Novel protein coding gene in an Antarctic fish
mindspawn writes:
You make a good point here regarding amplification. This isn't a novel feature, but extra coding genes are certainly a support for the basic processes of your view. I don't like genetic manipulation as proof of natural processes, but if they replicate real processes of nature then fair enough the information can be useful. Just for my information can you supply a link, thanks.
Artificial gene amplification reveals an abundance of promiscuous resistance determinants in Escherichia coli.
And a bonus!
Adaption to warmth involving two similar but non-identical duplication events on two different cultures, and a deletion event on a third culture, plus other adaptions through point mutations.
It should have occured to you by now that as positive and neutral duplications can occur, and positive and neutral point mutations can occur, you have no argument against neofunctionalization, which is merely a combination of duplication, then further mutation. What is there in duplicated genes that stops them mutating new function in exactly the way that non-duplicated genes do?
mindspawn writes:
The fact that you freely admit that the high copy numbers could have been there already, without showing proof that they were not there in the original population, kinda makes your whole point redundant. The same logic applies to AMY1.
No. You asked me whether I had thought of the possibility that there were high copy numbers in the "original population", and I said that I had. I had thought of it both in terms of an evolutionary scenario at some point in our ancestral group, and in terms of your 6,500 year old biosphere. That's why I knew you'd have problems with the idea of a supergenome and deletions going down less than 300 generations.
mindspawn writes:
Another good point. But if there was original variety then this would explain it (say 4 DNA strands, each containing a different copy number) .
So, anyone inheriting a lower number could duplicate up to a higher number without getting sick from too much dosage. Gone is the claim of duplications always causing problems.
But now you're catching on to what your model would require. In reality, there has to be a lot of diversity in the population 6,500 years ago in order to fit what we see today. Have you tried finding anything out about Copy Number Variation in humans, and fitting the data into your model?
And have you found out in which region of the world humans have the greatest diversity yet, as I suggested you should? It isn't the Middle-East.
mindspawn writes:
I feel you need more scientific backing for your claims here:
Says the man who keeps claiming that fairies can make genes.
I have to point out that it is your claim that no evolutionary processes can increase the number of protein coding genes. It remains entirely unsupported.
mindspawn writes:
You seem to hint that an intelligent designer didn't do a good job, I would like to see how man can improve an organisms fitness in nature through artificial processes, or artificial proteins.
What I was pointing out is that there would be many ways that a designer could make an antifreeze protein that would not look like duplication. There is no need for a designer to design as if constrained to do things in the way that evolution does. Check out the history of anti-freeze in cars, and you'll see what I mean.
mindspawn writes:
You seem to hint that the antifreeze protein of our fish example is less functional because its a recent duplication that looks like other genes.
No. The original gene had developed a secondary function that was relatively inefficient. It gave some protection to the eggs, but did not produce an antifreeze for the bloodstream. But it couldn't mutate away from its primary (and very different) function. Do you understand the idea of EAC (Escape from Adaptive Conflict)?
mindspawn writes:
How dissimilar are the functions? If the functions of both genes are similar, this would account for the similarity in design.
The paper I thought you'd read before disagreeing with its conclusions.
I can't give you more detail than the research team.

This message is a reply to:
 Message 546 by mindspawn, posted 02-27-2013 7:23 AM mindspawn has replied

Replies to this message:
 Message 604 by mindspawn, posted 03-01-2013 7:21 AM bluegenes has replied

  
bluegenes
Member (Idle past 2506 days)
Posts: 3119
From: U.K.
Joined: 01-24-2007


(1)
Message 596 of 871 (692180)
02-28-2013 2:53 PM
Reply to: Message 595 by Taq
02-28-2013 2:16 PM


Designed to fly.
Taq writes:
mindspawn writes:
The same argument goes for birds, the features of birds are grouped for flight, whereas in mammals the features are grouped for adaptability. Birds have feathers, hollow bones, high metabolic rate, lay eggs. All these assist with flight.
I am sure that bats would be stunned to hear this.
And the Ratites* would be flabbergasted.
As for the poor confused penguin.....
*They could fly before the Fall.....then they fell.

This message is a reply to:
 Message 595 by Taq, posted 02-28-2013 2:16 PM Taq has not replied

  
bluegenes
Member (Idle past 2506 days)
Posts: 3119
From: U.K.
Joined: 01-24-2007


(1)
Message 623 of 871 (692368)
03-02-2013 5:28 AM
Reply to: Message 604 by mindspawn
03-01-2013 7:21 AM


Re: Novel protein coding gene in an Antarctic fish
mindspawn writes:
The very place they chose to artificially amplify genes, is the very place that nature already has multiple gene copies in most organisms (areas of disease resistance/antibodies/toxin resistance). So it was no arbitrary position that they chose to amplify, they were copying nature's ability to amplify disease/toxin resistance through multiple copies.
Now that I look at the study, it could merely be a reflection on nature's preference for multiple copies when under selective pressure. Just because nature SELECTS multiple gene copies for amplification under pressure, does not mean that nature PRODUCES multiple gene copies under pressure.
I'm not sure if you've quite understood the paper, but that last sentence of yours is correct. It produces them randomly all the time.
It's producing useful duplications that we were discussing.
Just a moment...
I like this study, probably the first to support your position, providing the original population was devoid of duplications, which appears to be the case. I am cautious and will reserve my judgment as I look into this more, but thanks for the study. As you say neofunctionalization or changed genes is a possibility ( I hope you know how extremely rare this is, I have only ever heard of two cases, both being doubtful) and so even if not observed, it is theoretically possible that a duplicate coding gene can then gain a new function.
You're welcome, and you're getting there! I don't know what you mean by "rare". Duplication + neofunctionalization wouldn't have to be an every day, every year, or every generation happening in order to account for the increase in number of protein coding genes in a population group from 1,000 to 20,000 (the scenario you were discussing in your debate with RAZD). The completion of such an event in one individual organism in the group every 10,000 years on average would get you there in 200 million years, and things have been evolving for far longer than that.
mindspawn (on copy number variation of AMY1 in humans) writes:
Ok so you have thought about the possibility that the high copy numbers could have already been in nature. Have you got any evidence that they were not there already?
Already when? In our hypothetical ancestral genome of 1000 protein coding genes? We wouldn't have been a starch digesting animal at that point, so I expect our AMY would have had a distant ancestor doing something else, and that this would be a distant ancestor of other genes we have now. Shall we look for relatives to test the hypothesis that genes, like organisms, come in families with nested heirarchies?
Or do you mean high copy numbers in a created population 6,500 years ago? I'd expect there to be considerable variation 6,500 years ago in an evolutionary scenario, and before. 300 generations is not a long time to create much variation. A clue to another of the problems for your model is in the word "copy". In that paper about adaption to heat that you enjoyed, there were duplication events in 3 of the cultures that all included the same key genes. But the duplications were all different. When genes are duplicated, it's in this messy kind of way. If the AMY1 duplications look as though they are on messy randomly inserted stretches of DNA, wouldn't it be reasonable for you to ask yourself if your creator wasn't trying to make things look as though they were products of mutation? You won't find lots of neat little AMYs sitting in a row, looking pretty.
mindspawn writes:
No , those with a higher number delete down. Those with ten, delete down to 7 if there is no positive selection. Those with 5 , delete down to 3. My model does not have duplications, it has deletions, and not too many either. the same logic applies to humans.
Deletions and duplications don't look the same. And there are far too many human CNVs to have occurred in the last 300 generations of evolution. I think you need all the deletions and duplications that you can get! You also need a very high mitochondrial DNA mutation rate for a 6,500 year old Eve. Which brings me on to the next subject.
mindspawn writes:
bluegenes writes:
And have you found out in which region of the world humans have the greatest diversity yet, as I suggested you should? It isn't the Middle-East.
Yes, I did find out. Its the Middle East. I have yet to see your arguments against haplotypes reflecting diversity, and against the Middle East having the greatest diversity. My evidence is that through mitochrondial haplotype studies, the Middle East has the greatest diversity.
Its only under evolutionary assumptions that the number of mutations in a population relates to how old that population is. Haplogroup diversity makes more sense.
High-throughput sequencing of complete human mtDNA genomes from the Philippines - PMC
The points made in that paper are absolutely fine, but they are not saying what you think they are, and their analysis and dating blows out your model, so I laughed when I read it.
You're making a mistake about the haplogroup maps which are used to illustrate human population groups around the world.
Ones like this:
It shows the subgroups of L3 outside Africa, because the interest is in human population spread, but it doesn't show the equivalent subgroups of L3 plus other haplogroups within Africa.
Here's L3
And:
L0
L1
L2
L4
L5
L6
If you look at the true haplogroups, rather than just at those used to illustrate population spread outside Africa, you can see that the true ones are an indicator of diversity, although they can be misleading. As the paper you linked to mentioned, older haplogroups can have arrived in an area relatively recently.
So, once again, which area of the world has the greatest diversity?
Edited by bluegenes, : No reason given.

This message is a reply to:
 Message 604 by mindspawn, posted 03-01-2013 7:21 AM mindspawn has replied

Replies to this message:
 Message 646 by mindspawn, posted 03-06-2013 8:27 AM bluegenes has replied

  
bluegenes
Member (Idle past 2506 days)
Posts: 3119
From: U.K.
Joined: 01-24-2007


(1)
Message 702 of 871 (693258)
03-13-2013 2:24 AM
Reply to: Message 646 by mindspawn
03-06-2013 8:27 AM


Re: Novel protein coding gene in an Antarctic fish
mindspawn writes:
Rather than me not understanding the paper, it seems you did not quite understand my comments. If in a laboratory they choose a particular organism that is lacking amplification, when the normal state of the species is known to be amplified, then they are pre-empting expected results by artificially creating amplification where nature already has it. They are just copying nature. Just the fact that they chose the place in the genome that is already known to have duplicates as their position to produce artificial duplicates, makes their conclusions about the value of coding duplicates doubtful.
No. The "normal state" isn't amplified. They amplify all the known protein coding genes. From the paper, with my bolding:
quote:
The next logical step was to survey the entire E. coli proteome for its latent ability to confer genuinely new phenotypes (rather than to recreate old ones).
Here, we describe a comprehensive search for promiscuous proteins that can impart new phenotypes on E. coli. We provide experimental evidence that the overexpression of preexisting E. coli proteins can provide resistance to >80 antibiotics and toxins. Our results suggest that the evolution of novel traits is surprisingly likely, and that even the genomes of well-characterized bacteria harbor substantial reservoirs of latent resistance determinants.
quote:
Concluding Remarks.
We have used two tools from functional genomics (PM plates and the ASKA collection) to conduct a comprehensive search for E. coli proteins that can impart improved growth in the presence of toxic compounds. The resulting catalog provides a unique picture of a bacterium's latent evolutionary potential and emphasizes the high frequency at which novel traits can evolve. By cataloguing sources of phenotypic innovation, we have revealed the diversity of adaptive mechanisms that can be underpinned by overexpression mutations such as gene amplification. Our results suggest that the IAD model is a biochemically and evolutionarily feasibleand perhaps dominantmechanism for the birth of new genes under selection.
Paper
mindspawn writes:
By rare, I mean in dispute, never convincingly observed. The e.coli example of novel genetic function is close, involves the promoter and not the gene, and mimics a close relative , the staphylococcus. Is it a new function? Or did the mutation re-activate a silent aerobic promoter that always existed in the active state of that gene in the staphyylococcus?
It certainly confers a new advantageous function. What happened was, firstly, at least two potentiating mutations. Then there was a duplication that formed a new hybrid gene. At this point the selection advantage was there, but still relatively weak. Then further duplications added copies (amplification) which greatly improved the new function. So, there was advantageous duplication upon advantageous duplication upon advantageous duplication.
Now, didn't you started off claiming that duplication was always disadvantageous?
Here's a pdf of the paper that describes the Lenski Advantageous Duplications.
And the other one I showed you, with the Advantageous Duplications adaptive to increased heat
And just for good measure, The malarial parasite regularly adapts to our attacks on it by both duplications (plural) and point mutations.
mindspawn writes:
Please! I'm happy with any proof or even schoolbook illustration of long-term nested hierarchies, I believe in short term hierarchies but everyone just seems to make sweeping statements in overconfident fashion on this site. I prefer a more scientific approach with examples of actual long-term nested hierarchies, instead of unproven philosophy.
Were you trying to make me laugh with that last sentence?.
The mtDNA haplogroups that we were discussing are a good example of what might be called a short term hierarchy (see chart below). It's a nested family tree of mutations within a species.
If you want a longer term one, what about the Elephantidae? They have nice long generations like us, so I'm wondering if you want to try to fit them into your 6,500 yr (about 260 generations) biosphere as one "kind"?
mindspawn writes:
Let me explain it this way, not to argue from evidence, but for you to understand my view on the matter. The biblical view is a move from an exclusive vegetarian pre-flood diet (includes starch) to a protein filled diet. Thus to start off the post-flood world with many individuals with high copy numbers, and then de-selection of those with high copy numbers makes perfect sense for a vegetarian population that subsequently becomes a hunter gatherer population in certain communities.
All hard science sans philosophie so far. How many people survive this flood?
If these hunter gatherer populations undergo urbanization in modern society, and a return to a less protein filled diet (expensive meat, no hunting) those rare individuals who have retained high copy numbers will become selected into greater proportions of the population. Thus we have a change in copy numbers merely through sexual variation, and not through mutational duplication.
IF some individuals undergo a duplication mutation in the same region, this would be duplicating what nature has already produced, high copy numbers in that area. This would explain the "messy" arrangements, but this is re-establishing sequences already there, the over-producing of proteins has never been observed to add to fitness.
Amplification has been observed to add to fitness. You may not realise it, but you're defeating your own arguments against an evolutionary scenario. If humans are perfectly healthy with high copy numbers of AMY1, there is nothing to stop them having evolved by duplication from one original.
I entirely agree that there would have been copy number variation and high copy numbers present in the population 6,500 years ago (and before).
Did you know that there are some genes with hundreds of copies in some individuals, and copy number can vary by more than 100 between individuals? And, moving from CNV to SNPs, did you know that there are some genes with more than 1000 alleles at the same loci, and at least one that is known to have more than 2000? That's interesting when you consider that your original population could only have 4 between them.
mindspawn writes:
This is what I like, to get to actual numbers. You are stating a fact here "And there are far too many human CNVs to have occurred in the last 300 generations of evolution". Could you kindly back this up with exact figures please, or alternatively refrain from making sweeping statements.
Surely you agree. You would want Adam and Eve to have the maximum variation possible, wouldn't you? If they're like twins, you're in real trouble with your model. They have to have artificial different ancestry, just like they have artificial navels, and the first trees created have artificial tree rings, etc.
Scientific creationism can be fun!
And you've inadvertantly supported my statement earlier in the thread. You claimed that humans and chimps couldn't have 120,000,000 differences on the genome on a time scale of 5 to 7 million years based on mutation rates. Apply the same general principles to your model.
You have a bottleneck 6,500 years ago (260 generations), and another 4,500 years ago (180 generations). From that point, all modern Y-chromosomes are ~180 generations away from that of just one man (Noah). So, we could test your model against mutation rates estimated from pedigree studies. (These are within species, so we avoid your issues with common descent).
As you want figures, you can have lots of them.
Example of a Y-chromosome pedigree study
A human phylogeny with some time estimates for Noah/Adam which uses the same mutation rate estimate concluded in the pedigree study above.
So, if you read and understand those papers, you can see that we have a reasonable falsification of your 6,500 year old biosphere.
mindspawn writes:
bluegenes writes:
You also need a very high mitochondrial DNA mutation rate for a 6,500 year old Eve.
- this statement also needs actual figures to back it up.
It's stating the obvious. Here you can do the same as with the Y-chromosome above. Pedigree studies won't give us the real time of mitochondrial Eve for a variety of reasons, but they can give an indication of the most recent time possible. For example, this paper makes a <15,000 year old mitochondrial Eve seem extremely unlikely, and a 6,500 year old Eve essentially impossible.
mindspawn (concerning his claim that humans originated in the middle-east) writes:
I'm happy with the information I have presented.
You haven't presented any "information". You've just made a mistake.
mindspawn writes:
I feel that the fact that most haplogroup maps show that the greatest diversity is in the Middle East, is satisfactorily convincing. The only evidence I have seen against this is that the DNA from Africa shows more mutations, and is therefore older. This logic is incomplete because it is a well known fact that mutation rates are higher during prolonged sun exposure, and so the higher mutations in African DNA does not necessarily reflect the older population. Without evidence presented from you, the argument favors the Middle East, although some would generalize the origin of humans from South-Western Asia.
You don't understand haplogroups or the maps, do you? African DNA is not any "older" than anyone else's. What you do find in Africa is slightly more general genetic diversity than elsewhere, both in terms of SNPs and CNVs. That's because there hasn't been a bottleneck there for a very long time, whereas everywhere else there has been at least one "founder effect" bottleneck. However, none of these founder effect groups seem to have been particularly small, so that even in America and Australia, where more than one founder effect has happened en route from Africa, people have retained most of human variation.
Read the Y-chromosome phylogentic tree paper I linked to further up.
Africa
click pic. to enlarge - African mt. DNA haplogroups with out of Africa folk on the far right (M and N).
The African haplogroups that get left out of "how we moved round the world" maps. Those maps mark the subgroups of L3-M and L3-N at the bottom right. Nearly all out of Africa people are L3 Africans in either the M or N subdivisions.

This message is a reply to:
 Message 646 by mindspawn, posted 03-06-2013 8:27 AM mindspawn has replied

Replies to this message:
 Message 748 by mindspawn, posted 03-25-2013 4:47 PM bluegenes has replied

  
bluegenes
Member (Idle past 2506 days)
Posts: 3119
From: U.K.
Joined: 01-24-2007


(1)
Message 722 of 871 (693427)
03-15-2013 7:02 AM
Reply to: Message 721 by Tangle
03-14-2013 6:21 PM


Ask Blue Jay!
Tangle writes:
Anyone able to track down and understand the original research?
You could always try clicking on the link in the fifth sentence of the BBC article.
The abstract you found (available in full here) is earlier research by same team, but no harm done, as it also looks interesting.
Here's the 2013 paper.
At a brief glance, processes include mutations on both coding and regulatory genes, plus my current favourite, increased protein expression due to selection on variable copy numbers of genes. That's how they harden their cuticles against our onslaughts. The kind of old tricks that rapidly reproducing organisms that exist in great numbers get up to. We do them all as well, but in relative slow motion.
There's certainly "novelty", by any non-creationist definitions.
EvCs own bug man Blue Jay might be able to help you, and, looking at the affiliations, might well know one or more of the authors. He might even be one of them!

This message is a reply to:
 Message 721 by Tangle, posted 03-14-2013 6:21 PM Tangle has not replied

Replies to this message:
 Message 724 by Blue Jay, posted 03-15-2013 12:09 PM bluegenes has not replied

  
bluegenes
Member (Idle past 2506 days)
Posts: 3119
From: U.K.
Joined: 01-24-2007


(3)
Message 751 of 871 (694956)
03-31-2013 11:30 AM
Reply to: Message 748 by mindspawn
03-25-2013 4:47 PM


Re: Novel protein coding gene in an Antarctic fish
mindspawn writes:
They already harbor latent reservoirs. This isn't evolution, its latent. Their conclusion is not consistent with their own wording. Genomes already hold the ability to adapt, the adaptation is not proof of evolution of the genome, its proof that the GENOTYPE has the latent ability to express itself in differing PHENOTYPES.
"Latent" in this context means "potential" (look it up!). The genome has the potential to adapt by mutation (in this case, duplication leading to amplification) causing a new phenotype. That is evolution.
Remember, I showed you this paper along with others (like the adaptation to warmth by duplication one) to show you that duplications can be advantageous on arrival as well as neutral and detrimental. You already know that point mutations can change the protein product of coding genes in ways that are advantageous or neutral. So, you have an answer to your question, which was how can evolution increase the number of protein coding genes from 1000 to 20,000. Combine the processes. Add a gene by duplication, then, like other genes, it is subject to change by point mutations. Voil. You've got a new coding gene.
mindspawn writes:
(how would evolution ever produce LATENT abilities in the gentoype .... natural selection - WOW that's funny)
Why would the advantageous potential (latent) ability of self-replicators to adapt being favoured by nature over the hypothetical lack of that ability be "funny"? Static self-replicators would perish in an ever changing environment, so the survival advantage of strains that replicate with variation would be better described as " obvious" rather than "funny".
mindspawn writes:
I appreciate the fact that you are the first to emphasize the AMPLIFICATION that occurred in that particular example. No-one else has mentioned this, not even RAZD in our private discussion. I believe the amplification adds more to the evoltuionists argument than the initial duplication and activation.
You'd have noticed that there are about thirty amplifications of the new gene in the Antarctic fish paper which is mentioned in the subtitle above if you'd read it carefully. There are variations by point mutation between these, as well. They are, from memory, 97% to 99% identical. Read the paper carefully, and you will see that they have analyzed a historical sequence of events which happened entirely by common types of mutation that can be observed in the lab. There's a duplication, which enables one copy to mutate away from the primary function and form the anti-freeze protein, then further duplications of the new gene.
mindspawn writes:
Yet I honestly feel you have not addressed the possibility that these duplications are merely copying what was already in nature. When the number of duplications goes beyond anything already found in nature, you would have a point.
How can a new copy already be there? And why can't the new copy mutate to produce novelty in the phenotype just as other genes do?
If you read and understand the various papers I've shown you, you should be able to see very clearly that novel protein coding genes can be produced by well established processes. Duplication, then point mutation on one or both of the copies.
mindspawn writes:
Its only logical that if the E.coli used to be aerobic and have amplification in its citrate transporting region then it would have de-selected its useless amplification once the aerobic promoter was disabled in an anaerobic environment.
It's not just a question of selection. Do you not understand that experiments like the adaption to warmth one and the Lenski experiment start from one original organism. The cultures derived from this are initially clones. The original genome is known, so that the researchers can identify what has arrived by mutation. So, novel features in the genotype and phenotype can be observed to arrive in the lab.
We have to compare it to its original state which was aerobic, as can be concluded by the fact that it does have an existing aerobic promoter in the rnk gene. Natural selection could never create a promoter for oxic conditions if it was never active in oxic conditions. that makes no sense under evolutionary conclusions, so logically under both creationism and evolution, E.Coli used to be active in oxic conditions. And therefore could have deselected amplifications once becoming anaerobic. The fact that nature can now duplicate itself back to an optimum when aerobic selection pressure is nor re-applied, does not mean it can surpass that optimum.
Be careful. On the basis of known adaptations, you'll find yourself having to argue that a whole variety of modern pesticides were being used in the garden of Eden, and that Adam and Eve were wearing nylon and treating themselves with a range of antibiotics while also using modern anti-malarial drugs. I think you might have a few theological problems with all that, as well as the obvious historical ones.
Remember, the Lenski adaptation required enabling mutations + the creation of a new regulatory gene by a duplication as well as the amplifications.
mindspawn writes:
I haven't got time to delve into these links in this post, but have maintained the links so that I can address them in the next post, but they do look like good challenging studies. (please quote this comment in your next post so I don't forget)
Just a moment...
http://www.plosgenetics.org/...0.1371%2Fjournal.pgen.1000243
As requested.
mindspawn writes:
I wasn't trying to make you laugh, but I've had a few good laughs here on this site, so it's cool if you get a few as well Remember both the Baramin view, and evolution would support short term nested hierarchies with approximately 99.5 percent or more genetic similarity between two species (eg like the mammoth/elephant or the tiger/lion or the human/Neanderthal).
I think you'll find that the young earth Baramin view will require extremely high levels of mutation to account for the differences within elephants. Deceptively, Asian elephants and the mammoth are closer to each other than they are to African elephants. What'll happen if the genomes are fully sequenced, and you find that the quantity of difference between African and Asian elephants is far too great for them to have come from a bottleneck 4,500 years ago? It certainly will be.
Based on the genomes of two mammoths and some African elephants, the current estimates of the difference between the mammoths (+ Asian elephants) and the Africans is about half that of the differences between humans and chimps. Tens of millions.
mindspawn writes:
Now when I see the elephant and the hyrax put into a hierarchy together, it speaks to me of evolutionary assumptions. There are some phenotype and genotype similarities between the two, just as the human shares DNA sequences with coral. This does not prove a hierarchy, it once again proves that sets of features can sometimes be best in a combination.
Does it? Why? But forget the hyrax. What I'm saying is that you'll require lots of elephant and mammoth pairs on the Ark (plus all the food they need for a year) in order to account for their current diversity. Remember your claim that it's impossible to get 120 million differences on the genome between humans and chimps in 5 to 7 million years? Well, you certainly won't get the differences between African and Asian/mammoth elephants (~60 million) from a tiny bottleneck 4,500 years ago, will you? These are different species with generation times like ours.
For example, give the elephants 100 mutations per generation going to fixation along each lineage going back 180 generations back to your 4,500 yr old Ark. The fixed difference between any two groups separated by 360 generations should be about 36,000, not 60,000,000! The two mammoth I mentioned were from different groups, and they differ from each other by millions of point mutations as well. Then, in extant elephants, there are different breeds and sub-species within Africans and Asians, with some experts arguing for more that one species in Africa.
Are you beginning to understand how your young earth model is easily falsified by genetics alone, without even talking about archaeology, paleontology, geology and cosmology?
Its neither here nor there, you would need a trail of transitional fossils from the original giant hyrax, showing transitions to an elephant that would add more weight to your nested hierarchy. To a creationist it looks like a number of completely separate baramins (hyrax is too different to an elephant) and some short term devolution/evolution from baramins (elephant/mammoth). ie the long-term "nested hierarchys" do not in any manner favor evolution over recent baramins.
How do you decide what's "too different" to be related? Surely the limit should be set by the quantity of genetic differences possible in your time scale. That's so little that you'll not only have to separate the common chimps from the bonobos and us from Neanderthal, you'll have to separate Africans from Australian aborigines and have them separately created in different Edens.
mindspawn writes:
The fact that both share a few features, shows that fitness is sometimes maximised in groupings of features.
Does it? How?
mindspawn writes:
Attempts to show that feature groupings are not maximised, but are the less perfect result of a natural evolutionary path from a common ancestor, have not been convincing.
To whom? Experts in the relevant fields?
mindspawn writes:
So if a few of these eight humans had higher copy numbers, and a few had lower copy numbers, the high copy numbers had no advantage in the meat eating society just after the flood. It is only recently that the ones with high copy numbers would be favored. I was just pointing out that a modern return to alleles that favor vegetarianism does not contradict the biblical theory, rather it affirms the biblical notion of a pre-flood vegetarian society followed by a post-flood meat eating society. An observation of copy number increases is no proof of evolution, its just proof that humans with high copy numbers are currently favored with modern diets. Anything else is jumping to conclusions, and those sort of jumps are unscientific.
You're forgetting your original point. The claim that duplication is always disadvantageous. If a duplication of AMY 1 occurs in one of your grandchildren, how can it be anything other than neutral or advantageous (depending on the kid's future diet)? I brought up the AMY1 gene along with the lab examples in bacteria and wild examples in the malarial parasite in order to demonstrate that your claim was clearly false.
mindspawn writes:
bluegenes writes:
Amplification has been observed to add to fitness. You may not realise it, but you're defeating your own arguments against an evolutionary scenario. If humans are perfectly healthy with high copy numbers of AMY1, there is nothing to stop them having evolved by duplication from one original.
I entirely agree that there would have been copy number variation and high copy numbers present in the population 6,500 years ago (and before).
Did you know that there are some genes with hundreds of copies in some individuals, and copy number can vary by more than 100 between individuals? And, moving from CNV to SNPs, did you know that there are some genes with more than 1000 alleles at the same loci, and at least one that is known to have more than 2000? That's interesting when you consider that your original population could only have 4 between them.
Just because I'm a creationist, does not mean I deny all mutations. SNPs are single nucleotide polymorphisms. ie they involve just one little change to a gene. These are pretty common each human has about 30 point mutations per generation. This is a conservative estimate, the estimates do vary. So about 1 in 700 genes are affected in each offspring (21000 coding genes/30). So for every 700 people born, you should average one new allele at each locus. For every 70 million people born, you should get 100000 new alleles at each locus. For every 7 billion people born you should get 10 000 000 new alleles at each locus . I dare say, the figure 2000 is possibly just a reflection of the lack of genome sequencing done across the entire human population, it should logically be WAY higher than 2000 per locus.
Protein coding genes only comprise ~1% of the genome. So, you're out by two orders of magnitude. At your mutation rate and with your calculations, one in 70,000 of the population would mutate on a particular coding gene. Then, if you understand population genetics and assume all the mutations to be close to neutral, only a tiny minority of the modern population would have variants in point mutations from the original 4 alleles of Adam and Eve, although there would be lots of these variants (any neutral mutation that occurred would remain in one in 70,000 of the total population with average drift luck). So, we have a prediction from your model. What we should see in the present population is the overwhelming majority with the 4 original alleles. Take a random sample of 100 people from around the world, and there won't be much variation, if any at all, from the original 4.
Would you like that prediction to be tested?
In addition, you have another prediction about the Y chromosome of Noah, which all men should have, without having much more than 60 point mutations difference from the original, and therefore not much more than 120 differences between any two individuals (from pedigree studies of Y-chromosome mutation rates like the one I showed you).
Would you like that prediction to be tested?
mindspawn writes:
I haven't got time tonight for the rest of your post, but thanks for your challenging post.
You're welcome. And thanks for the image of the Ark with a sizeable herd of genetically variable elephants on it, a big enough job for 8 zookeepers on its own!
It's actually the research papers that are challenging to your beliefs, not my posts.
Edited by bluegenes, : No reason given.
Edited by bluegenes, : missing word

This message is a reply to:
 Message 748 by mindspawn, posted 03-25-2013 4:47 PM mindspawn has replied

Replies to this message:
 Message 851 by mindspawn, posted 04-23-2013 5:10 AM bluegenes has replied

  
bluegenes
Member (Idle past 2506 days)
Posts: 3119
From: U.K.
Joined: 01-24-2007


Message 801 of 871 (696140)
04-12-2013 12:40 PM
Reply to: Message 796 by mindspawn
04-08-2013 2:21 PM


Hi mindspawn. New topic coming up.
I know my posts require you to read and understand quite a few research papers, so I'm not surprised that it takes some time to reply to this: Message 751
Part of what we're discussing (the increase in numbers of coding genes by successive mutations over time) is certainly relevant to a thread on the evolutionary origin of novelty. However, my falsification of your young earth model by genetics alone isn't really on topic, so I'll start a new one on that alone. It'll be called something like "Can the standard YEC model be falsified by genetics alone?". I'll show that it can, as a special present for you and any other YECs around.

This message is a reply to:
 Message 796 by mindspawn, posted 04-08-2013 2:21 PM mindspawn has replied

Replies to this message:
 Message 802 by mindspawn, posted 04-13-2013 3:40 AM bluegenes has replied

  
bluegenes
Member (Idle past 2506 days)
Posts: 3119
From: U.K.
Joined: 01-24-2007


(1)
Message 803 of 871 (696182)
04-13-2013 5:10 AM
Reply to: Message 802 by mindspawn
04-13-2013 3:40 AM


Re: Hi mindspawn. New topic coming up.
mindspawn writes:
I'm keen to get into the dating thread too, and also start my own one on radiometric dating. None of this can happen soon.
Yes. But there's not much point in pursuing your young 6,500 year old biosphere model when it can be falsified by current observations in genetics, is there?

This message is a reply to:
 Message 802 by mindspawn, posted 04-13-2013 3:40 AM mindspawn has replied

Replies to this message:
 Message 804 by mindspawn, posted 04-13-2013 5:25 AM bluegenes has replied

  
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