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Author Topic:   The Dawkins question, new "information" in the genome?
creationistal
Inactive Member


Message 31 of 67 (146041)
09-30-2004 12:34 PM
Reply to: Message 29 by crashfrog
09-30-2004 12:30 PM


We infer it from the observation of the same kind of change occuring today
Yes but you aren't observing new functions or organs being *developed* by natural selection, are you? You can observe changes, but not additions at a functional level, right?
-Justin

This message is a reply to:
 Message 29 by crashfrog, posted 09-30-2004 12:30 PM crashfrog has replied

Replies to this message:
 Message 33 by crashfrog, posted 09-30-2004 12:39 PM creationistal has replied

  
crashfrog
Member (Idle past 1492 days)
Posts: 19762
From: Silver Spring, MD
Joined: 03-20-2003


Message 32 of 67 (146042)
09-30-2004 12:37 PM
Reply to: Message 26 by creationistal
09-30-2004 12:21 PM


I don't see how you get from that to elephants without having some sort of "evolution". Do you see what I am getting at?
No.
Did a population of tapirs suddenly have kids with long trunks?
No, presumably, a population of short-trunk elephants developed increasinly longer trunks over many, many generations. Or, perhaps it happened quickly, when elephant populations were very small.
If so, where is *any* showing of this in the fossil record, or anywhere else for that matter?
Have you ever seen an elephant fossil trunk? Neither have I. Do you think that might be because soft tissues like trunks don't generally fossilize?

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 Message 26 by creationistal, posted 09-30-2004 12:21 PM creationistal has not replied

  
crashfrog
Member (Idle past 1492 days)
Posts: 19762
From: Silver Spring, MD
Joined: 03-20-2003


Message 33 of 67 (146045)
09-30-2004 12:39 PM
Reply to: Message 31 by creationistal
09-30-2004 12:34 PM


Yes but you aren't observing new functions or organs being *developed* by natural selection, are you?
No, that has never happened. Organs don't just spring into being. They don't have to - organs develop evolutionarily over time; the function of tissues is not constant.
You can observe changes, but not additions at a functional level, right?
Changes are additions on a functional level. We do observe the evolution of new functionality, but this takes many generations, so we only have observations in things like bacteria.
Function is not constant through time. Evolution often co-opts organs for new purposes.

This message is a reply to:
 Message 31 by creationistal, posted 09-30-2004 12:34 PM creationistal has replied

Replies to this message:
 Message 37 by creationistal, posted 09-30-2004 12:45 PM crashfrog has not replied

  
creationistal
Inactive Member


Message 34 of 67 (146046)
09-30-2004 12:40 PM
Reply to: Message 30 by crashfrog
09-30-2004 12:33 PM


When someone wins the lottery, do you grapple with the incredibly small chance that they would have won? Why or why not? It seems to me like you accept improbable events all the time.
It's disingenous to claim the odds of winning the lottery are comparable to what we are talking about here.
What's the fundamental difference between humans and single-celled organisms? Aren't they both based on genetics?
The fundamental different is that organmism don't "think, therefore they are", if you know what I mean. But that's another issue.
It doesn't explain how homosapiens have pieces of genetic information in us that operate organs and functions that *don't work without each other*. The same goes for any number of living things in the world. There are things that either aren't worth keeping by evolving slowly, or things that couldn't evolve without something else at the same time.
You are talking about odds that are beyond astronomically large. Far beyond. Essentially, zero chance.
-Justin

This message is a reply to:
 Message 30 by crashfrog, posted 09-30-2004 12:33 PM crashfrog has replied

Replies to this message:
 Message 36 by Wounded King, posted 09-30-2004 12:45 PM creationistal has not replied
 Message 48 by crashfrog, posted 09-30-2004 4:14 PM creationistal has replied

  
Chiroptera
Inactive Member


Message 35 of 67 (146047)
09-30-2004 12:43 PM
Reply to: Message 23 by crashfrog
09-30-2004 12:02 PM


Excellent! Another one for my "What good is 10% of a...." file!

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 Message 23 by crashfrog, posted 09-30-2004 12:02 PM crashfrog has not replied

  
Wounded King
Member
Posts: 4149
From: Cincinnati, Ohio, USA
Joined: 04-09-2003


Message 36 of 67 (146049)
09-30-2004 12:45 PM
Reply to: Message 34 by creationistal
09-30-2004 12:40 PM


It doesn't explain how homosapiens have pieces of genetic information in us that operate organs and functions that *don't work without each other*. The same goes for any number of living things in the world. There are things that either aren't worth keeping by evolving slowly, or things that couldn't evolve without something else at the same time.
*SNIP* Keystone Arch *SNIP*

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creationistal
Inactive Member


Message 37 of 67 (146050)
09-30-2004 12:45 PM
Reply to: Message 33 by crashfrog
09-30-2004 12:39 PM


Organs don't just spring into being. They don't have to - organs develop evolutionarily over time; the function of tissues is not constant.
Examples? Sources I can look at on this? Remember, I'm new to this kind of thing.
-Justin

This message is a reply to:
 Message 33 by crashfrog, posted 09-30-2004 12:39 PM crashfrog has not replied

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 Message 38 by creationistal, posted 09-30-2004 12:46 PM creationistal has not replied

  
creationistal
Inactive Member


Message 38 of 67 (146052)
09-30-2004 12:46 PM
Reply to: Message 37 by creationistal
09-30-2004 12:45 PM


*SNIP* Keystone Arch *SNIP*
How helpful and enlightening. I'm asking these things because I DON'T understand these things.
-Justin

This message is a reply to:
 Message 37 by creationistal, posted 09-30-2004 12:45 PM creationistal has not replied

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 Message 39 by Wounded King, posted 09-30-2004 12:58 PM creationistal has replied

  
Wounded King
Member
Posts: 4149
From: Cincinnati, Ohio, USA
Joined: 04-09-2003


Message 39 of 67 (146061)
09-30-2004 12:58 PM
Reply to: Message 38 by creationistal
09-30-2004 12:46 PM


Dear Creationistal,
For someone who doesn't understand you seem awfully sure that you know evolution is contradicted by mathematics and the 2nd law of thermodynamics and that there are no transistional fossils.
All you are doing is reiterating one of the oldest creationist arguments in the book, the argument from design. As you may know the argument from design has had a lovely new makeover in recent years and is now the cornerstone of the Intelligent Design movement tied up in the idea of irreducible complexity.
The main point of the argument from design being that it would be impossible for all of the components of a particular system, a watch or eye in Paley's original argument and a bacterial flagellum for Michael Behe, to evolve in isolation as all the components are required for the whole to be functional.
This argument has been rebutted many times over the centuries and the most frequent analogy used to demonstrate the major flaw of 'irreducible complexity' is that of a keystone arch where the structure must first be built using a scaffold but from which the scaffold can later be removed leaving the structure standing.
Since all that is happening is that you are bringing up an argument that has been covered dozens of times in many threads on this forum I thought I would miss out all the tedious explaining and just give the keypoint of the argument, think of it as a sort of shorthand. Just put keystone arch into the forum search feature and you would have found many better explanations than mine.
TTFN,
WK

This message is a reply to:
 Message 38 by creationistal, posted 09-30-2004 12:46 PM creationistal has replied

Replies to this message:
 Message 40 by creationistal, posted 09-30-2004 1:19 PM Wounded King has replied

  
creationistal
Inactive Member


Message 40 of 67 (146076)
09-30-2004 1:19 PM
Reply to: Message 39 by Wounded King
09-30-2004 12:58 PM


For someone who doesn't understand you seem awfully sure that you know evolution is contradicted by mathematics and the 2nd law of thermodynamics and that there are no transistional fossils.
Actually what I said was:
creationistal writes:
I'm still undecided on how much of the current ToE I can accept given mathematics and the 2nd law of thermodynamics. There is a certain quality to life that is undeniable, that it does indeed flourish where it shouldn't, or we think couldn't, etc.
Seems a little different than what you are saying, to me.
I am hesitant to post a long quote, but I think it is pertinent to this discussion. I've been reading (a lot lately, good God) this debate that Dr. Pitman had last year on Talk.Origins, and there is one bit in particular I think that sums up what my gut is telling me about the mathematical improbabilities of this theory. He explains it better than me because he knows better the intracacies in what he's talking about. Rebuttal to this statement would help me understand a lot better the evolutionary perspective on getting functions with blind luck.
They were specifically talking about the lactase function in E. coli, and how even under supreme ideal circumstances development of a specific function would not arise even after thousands upon thousands of generations.
As you said, "So it is with life. We are not picking a fixed target and attempting to approach it with mutations. There are many possible goals and many paths to each one." The problem is that every path is long no matter which path is taken. In fact, when it comes to certain complex functions in living things, the average distance of a path to any one of a number of possible goals is so large that even with a huge population taking many different paths, the time required to reach any of the potentially beneficial targets is still huge. For example, take those functions that require at least 100 amino acids to perform them. How many of these functions would be beneficial to a given organism in a particular environment? Maybe a billion? or a trillion? Maybe a trillion trillion? Maybe, but most likely not anywhere near the 1 x 10e130 different potential 2D sequences that could be had. By far the vast majority of these 1 x 10e130 proteins would be of no beneficial use to any particular organism. If even a trillion trillion functions could be of some beneficial use, this is still a tiny fraction of the total leaving only slightly less than 1 x 10e130 different proteins that would not be beneficially functional.
This means that each one of the trillion trillion functions would be surrounded by 1 x 10e106 proteins that would not be beneficially functional. In moving from one function to any one of the other trillion trillion functional sequences out there, one would have to cross a vast sea of nonfunction... no matter which direction one started out in. These functions are like tiny islands in a vast sea. No matter how many beneficial functional islands there might be out there somewhere in this ocean, the waters of nonfunction that separate them are vast indeed. The boat of neutral evolution just drifts around on this sea randomly until it comes across some new function that can be recognized as beneficial by natural selection. However, until this new function is realized, natural selection is blind to all neutral/nonfunctional genetic changes that occur in the meantime.
This leaves random chance as the loan power for change. And, random chance alone simply takes too long to cross this sea to any one of the billions, trillions or even zillions of possible functions that may be out there.
That doesn't address the 3D nature of proteins, and folding, etc, which creates even more doubt for me.
-Justin
This message has been edited by creationistal, 09-30-2004 12:21 PM
This message has been edited by creationistal, 09-30-2004 12:23 PM

This message is a reply to:
 Message 39 by Wounded King, posted 09-30-2004 12:58 PM Wounded King has replied

Replies to this message:
 Message 41 by Wounded King, posted 09-30-2004 1:37 PM creationistal has replied
 Message 46 by Ooook!, posted 09-30-2004 3:08 PM creationistal has replied

  
Wounded King
Member
Posts: 4149
From: Cincinnati, Ohio, USA
Joined: 04-09-2003


Message 41 of 67 (146091)
09-30-2004 1:37 PM
Reply to: Message 40 by creationistal
09-30-2004 1:19 PM


For example, take those functions that require at least 100 amino acids to perform them.
He explains it very badly indeed. It is an argument from incredulity based on numbers he has reached through his own assumptions and criteria.
Does he mean that all 100 amino acids have to be exactly right for functioning? Or that they all have to come about at one time? If so all he is doing is constructing a huge strawman. In many cases a number of amino acids can substitute for each other and leave a protein functional.
When one sees calculations like these being bandied around the first thing to do is be very sure of what the assumptions are that it is based on. Such calculations are only as good as their assumptions. This one seems to assume nothing but randomness
Throwing huge numbers around doesn't mean anything unless you are explicit about where those numbers come from.
TTFN,
WK

This message is a reply to:
 Message 40 by creationistal, posted 09-30-2004 1:19 PM creationistal has replied

Replies to this message:
 Message 42 by creationistal, posted 09-30-2004 1:48 PM Wounded King has not replied
 Message 43 by Wounded King, posted 09-30-2004 1:49 PM Wounded King has not replied

  
creationistal
Inactive Member


Message 42 of 67 (146099)
09-30-2004 1:48 PM
Reply to: Message 41 by Wounded King
09-30-2004 1:37 PM


They were specifically talking about the lactase function in E. coli, and how even under supreme ideal circumstances development of a specific function would not arise even after thousands upon thousands of generations.
That's what my larger point is getting at. The point of the quote is to question the sense in claiming that in 4.5 billion years, natural selection and mutations and everything else swam the sea of non-functionality and managed to find every island of funcationality required to get to *us*, given that there are bagillions of possible combinations and very few (comparatively) known functioning ones.
-Justin

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 Message 41 by Wounded King, posted 09-30-2004 1:37 PM Wounded King has not replied

  
Wounded King
Member
Posts: 4149
From: Cincinnati, Ohio, USA
Joined: 04-09-2003


Message 43 of 67 (146104)
09-30-2004 1:49 PM
Reply to: Message 41 by Wounded King
09-30-2004 1:37 PM


Lactase seems a strange choice as I seem to recall a number of studies showing that E. coli with Lac-Z deletions under selective pressure with lactose evolved a number of different novel lactases, often under the same sort of regulation as Lac-Z, but not always.
TTFN,
WK

This message is a reply to:
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creationistal
Inactive Member


Message 44 of 67 (146107)
09-30-2004 1:54 PM
Reply to: Message 43 by Wounded King
09-30-2004 1:49 PM


Yeah I don't know about the properties of that particular one or why they chose it. Do you know where I can read those studies you are talking about? Or even summaries of the information I COULD understand?
On edit: It appears that Hall's original experiments with this did get the E. coli to perform the same function of the gene he deleted. However, it was just modification of a gene already there that replaced the lacZ gene's function.
In addition, the gene that took its place was almost identical to the lacZ to begin with. One Hall deleted the modified gene, the lactase function did NOT reappear even with tens of thousands of generations.
-Justin
This message has been edited by creationistal, 09-30-2004 01:01 PM
This message has been edited by creationistal, 09-30-2004 01:11 PM

This message is a reply to:
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creationistal
Inactive Member


Message 45 of 67 (146111)
09-30-2004 2:05 PM
Reply to: Message 44 by creationistal
09-30-2004 1:54 PM


It is not a difficult thing to evolve a particular function if that function is only one point mutation (one step) away from realization. The odds that one particular point mutation will happen rapidly in an average sized bacterial colony are extremely good. Such evolution is really not a problem. The problem comes when a particular function cannot be achieved with just one point mutation. Hall's experiment is quite interesting as far as demonstrating that some beneficial functions are only one mutation away from what is already present in certain gene pools, but it does not explain how functions that are, on average, multiple neutral mutations away from any new and beneficial type of function can be realized in a reasonable amount of time.
More Pitman there, maybe that helps explain what I'm getting at better. Hall's experiment doesn't answer the complexity problem, that is first of all, how possible it is to even evolve something complex that is not already close by functionality-wise, and second of all, the staggering odds of it happening CONSTANTLY for billions of years to get the beyond-comprehension complexity of today's human brain, for example.
-Justin
This message has been edited by creationistal, 09-30-2004 01:05 PM

This message is a reply to:
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