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Author Topic:   Help in teaching 11-12 Year olds (RE (Religious Education) in the UK)
Granny Magda
Member
Posts: 2301
From: UK
Joined: 11-12-2007


Message 76 of 126 (538795)
12-10-2009 6:40 AM
Reply to: Message 73 by Peg
12-10-2009 6:30 AM


Re: Do not mix science and religion
no you are wrong.

its not about which God at all. Its about creation vs evolution.

So you would be happy to accept that Brahma might have made the first life?

the very earliest lifeforms were far from simple, so there goes your first point

You are being unreasonable and evading the point. Comparitively simple life then. OK?

God made comparitively simple life... and it evolved.

How can you rule this out? You seem to have no trouble doing so; on what basis do you dismiss the idea?

chemicals do not come to life, there goes your second.

No chemical that you know of has come to life. Unless you are suggesting that you have observed every single individual example of a chemical substance that ever existed, you do not know whether chemicals come to life or not. On what basis can you rule this out? That you have never seen it? I have never seen the creation of the Earth, but I have a feeling that it happened nonetheless.

DNA prevents species jumping the very real entirely arbitrary and imaginary barrier that keeps them replicating in the manner of their parents.... so none of what you've said has any founding.

Fixed that for you. Or perhaps you disagree. If so, please point out this boundary. I'd love to see it.


Mutate and Survive

Edited by AdminModulous, : Sections not related to education hidden.


"A curious aspect of the theory of evolution is that everybody thinks he understands it." - Jacques Monod
This message is a reply to:
 Message 73 by Peg, posted 12-10-2009 6:30 AM Peg has responded

Replies to this message:
 Message 79 by Peg, posted 12-10-2009 7:13 AM Granny Magda has responded

  
Modulous
Member
Posts: 7407
From: Manchester, UK
Joined: 05-01-2005
Member Rating: 3.6


(1)
Message 77 of 126 (538796)
12-10-2009 6:52 AM
Reply to: Message 66 by Peg
12-10-2009 5:39 AM


Re: what kids are taught
considering the toe has changed somewhat over the years, and scientists have been hotly debating the theory, then it is possible that that a theory could be wrong.

I'll split that into two parts.

First: Scientists aren't 'debating the theory' in the sense of debating whether it is true. They are debating which parts have more impact than another.

Second: However, it could still be true that a theory could be wrong. Science adopts the principle of fallibilism.
Why do you think this is important enough to stress here? It is true of all theories.

are all living things related?

The evidence strongly suggests that this is so.

how is a fish and a cow related?

They share a common ancestor that was a vertebrate.

a dog and a cat??

They share a common ancestor that was in the Order Carnivora.

thier DNA is not identicle, so how are they related?

I don't have identical DNA to my brother. And yet DNA testing would confirm that he was likely my brother (assuming he actually is).

Also, man and the ape may look similar, but it is impossible for man and ape to hybridize which kind of indicates that they are not related, yes?

No. There is no reason to base relatedness on the ability to create viable offspring.

abe: Let me expand on this. It is true that if we have one population that can freely breed and one which has difficulty interbreeding and one which can never interbreed we can use this as a method of sorting relative relatedness. But if I had a sister, and our genetic makeup meant that any child of ours had an 80% chance of not being viable (incest), that would not indicate that we were not closely related.

what genetic evidence is found in fossils?

Little to none, depending on what we mean by fossils. I didn't imply we could find genetic evidence in fossils.

what has cancer got to do with the subject???

You seemed to be of the opinion that if scientists cannot presently do something after spending some time trying, that means that it is impossible. You thought this was a killer argument against abiogenesis research, but you failed to realize that it applies to all ongoing research into subjects that have taken some time so far.

Such as Cancer research. By your reasoning we should shut down Cancer research because it is impossible.

Dont shy away from the fact that non living matter does not come to life

I don't understand what it means. What does 'come to life' mean? Is the carbon in my body 'alive'? Every part of my body was once non living matter, has it come to life?

Its what scientists themselves have shown time and time again.

No they haven't. They have shown that there are some interesting structures that can spontaneously self form, replicate, transmit information and under differential reproductive success. Is that 'coming to life'? I don't know. But even if they had completely failed so far, that isn't the same as showing something to be impossible.

This fact presents a major problem for how evolution got started...without non living matter springing to life, there could be no evolution

Why not? I used to think that God pressed his finger against a primordial pond and this zapped the first life forms into existence and from there evolution occurred. How could this not be true?

and we are just expected to believe that non living matter sprang to life even though good science has shown that its impossible????

You aren't expected to believe anything. You have not shown that any 'good' science has shown that life could not originate naturally.


And you seem to have drifted entirely off topic. Is there something specific that you think children are being taught that you have a problem with?

Edited by Modulous, : No reason given.

Edited by AdminModulous, : Sections not related to education hidden.


This message is a reply to:
 Message 66 by Peg, posted 12-10-2009 5:39 AM Peg has not yet responded

  
Peg
Member (Idle past 2340 days)
Posts: 2703
From: melbourne, australia
Joined: 11-22-2008


Message 78 of 126 (538797)
12-10-2009 6:55 AM
Reply to: Message 69 by Wounded King
12-10-2009 5:54 AM


Re: what kids are taught
Woundedking writes:

We can use genetic to determine degrees of relatedness in humans, what makes you think the exact same approach becomes impossible when we look at other animals?

the fact that all creatures have dna does not mean they are related.

Isnt it sterility that determines what species are related and what are not?
And isnt it true that breeding experiments have shown that appearance and similarity in genes (ie ape and man) is no basis to determine who is related?

Edited by AdminModulous, : Sections not related to education hidden.


This message is a reply to:
 Message 69 by Wounded King, posted 12-10-2009 5:54 AM Wounded King has responded

Replies to this message:
 Message 80 by Wounded King, posted 12-10-2009 7:19 AM Peg has responded

  
Peg
Member (Idle past 2340 days)
Posts: 2703
From: melbourne, australia
Joined: 11-22-2008


Message 79 of 126 (538798)
12-10-2009 7:13 AM
Reply to: Message 76 by Granny Magda
12-10-2009 6:40 AM


Re: Do not mix science and religion
So you would be happy to accept that Brahma might have made the first life?

again, its not the issue.

Granny Magda writes:

You are being unreasonable and evading the point. Comparitively simple life then. OK?
God made comparitively simple life... and it evolved.

How can you rule this out? You seem to have no trouble doing so; on what basis do you dismiss the idea?

because the cambrian period shows a burst of life in great variety as opposed to a slow gradual increase

because the genetic code stops a plant or animal from moving too far from its parents appearance. There is great variety i agree(eg humans, cats, dogs) but not so much that one living thing could change into another...genetics and dna determine what a creature will look like, not random mutations.

because what we actually see in living things is stability and a limited range of variation

Granny magda writes:

No chemical that you know of has come to life. Unless you are suggesting that you have observed every single individual example of a chemical substance that ever existed, you do not know whether chemicals come to life or not. On what basis can you rule this out?

so you believe there is a chemical out there that has the ability to come to life?
I wouldnt know, but im not going to base my world view on something that could be out there. I cant prove that its not out there...perhaps if scientists find it we will have the answer to abiogenesis.

granny magda writes:

Fixed that for you. Or perhaps you disagree. If so, please point out this boundary. I'd love to see it.

sterility

Edited by AdminModulous, : Sections not related to education hidden.


This message is a reply to:
 Message 76 by Granny Magda, posted 12-10-2009 6:40 AM Granny Magda has responded

Replies to this message:
 Message 83 by Granny Magda, posted 12-10-2009 8:57 AM Peg has responded
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Wounded King
Member (Idle past 1505 days)
Posts: 4149
From: Edinburgh, Scotland
Joined: 04-09-2003


Message 80 of 126 (538799)
12-10-2009 7:19 AM
Reply to: Message 78 by Peg
12-10-2009 6:55 AM


Relatedness
the fact that all creatures have dna does not mean they are related.

That wasn't what I said. Is asked why if similarities in genetics are sufficient to determine relatedness in humans then why not between animals and humans? There could quite easily be all sorts of organisms which used DNA but had a totally different set of genes and proteins than any other, but that isn't what we find, what we find is that organisms seem to share very large complements of genes and that a lot of genetic variation is based upon multiple variants of genes common to many organisms. For example the genetic complements of human and chimpanzee's are much more similar to each other than either is to a mouse. It isn't simply the fact that DNA is involved, it is the specific sequences of DNA.

Isnt it sterility that determines what species are related and what are not?

No it isn't, sterility doesn't really say anything about relatedness at all. One definition of distinct species is that when they mate they do not produce fertile offspring, this is post-mating reproductive isolation. We might assume that more closely related species are less likely to produce non-viable or sterile hybrids, but this need not be the case since only two or three mutations may be sufficient to cause offspring to be non-viable.

And isnt it true that breeding experiments have shown that appearance and similarity in genes (ie ape and man) is no basis to determine who is related?

No, I don't think it is true, perhaps if you could be a bit more specific about what breeding experiments you mean I could give you a clearer answer. Offhand I say that almost all comparative genetics suggests you are completely wrong and in fact genetic similarity is probably the very best way to determine relatedness.


TTFN,

WK

Edited by Wounded King, : No reason given.

Edited by AdminModulous, : Sections not related to education hidden.


This message is a reply to:
 Message 78 by Peg, posted 12-10-2009 6:55 AM Peg has responded

Replies to this message:
 Message 85 by Peg, posted 12-12-2009 6:13 PM Wounded King has responded

  
Brian
Member (Idle past 2370 days)
Posts: 4659
From: Scotland
Joined: 10-22-2002


Message 81 of 126 (538800)
12-10-2009 7:23 AM
Reply to: Message 9 by JJtheJester
10-20-2009 5:32 AM


Which one?
We have covered the creation story

Which creation story?

I've read through your posts on this thread and I doubt very much that you are a teacher. Think this is more of a fishing trip.


This message is a reply to:
 Message 9 by JJtheJester, posted 10-20-2009 5:32 AM JJtheJester has not yet responded

  
Huntard
Member
Posts: 2856
From: Limburg, The Netherlands
Joined: 09-02-2008


Message 82 of 126 (538805)
12-10-2009 7:48 AM
Reply to: Message 71 by Peg
12-10-2009 6:13 AM


Re: Do not mix science and religion
Peg writes:

know ther are many prominent Christian religious groups who accept that God used evolution to create life.


Then they are wrong. Evolution isn't about the origin of life. Peg, please, write it down on a post it and stick it to your screen, perhaps then you'll remember. Why does it not register, why?

Some teach that he preprogrammed the universe to develop on its own...this is theistic evolution.

If it's about evolution, then yes.

Jesus Christ did not believe in theistic evolution and we know this becuase he used the genesis account to reaffirm the sanctity of marriage specifically mentioning the creation of Adam and Eve.

Argument from authority. Did he believe in the germ theory of disease? Did he believe in the Theory of general and special relativity?

His disciple Luke also believed the Genesis account for in his Gospel he traces Jesus genealogy all the way back to Adam.

Argument from authority once more, which prompts the question: So?

If anyone knew about how life got started it was Jesus for he was the one who worked along side the Creator at the founding of the universe. I trust that he knew what he was talking about.

None of this is relevant to evolution. Like I said, even if god started all life, and even if it was the "created kinds" then evolution would still hsppen. Or do you deny "variation"?

no, thats just me not being able to separate 'evolution' from 'origins' again. To put it another way....if the 'origin' of life was by non living matter coming to life, then those creatures that first appeared were not direct creations by God.

Oh? And you know this how? Because the bible says so? But ok, for sake of discussion, let's go with the "created kinds" here. Do you deny they can have "variation"?

Im aware that animals can become varied over time...they diversify in their features.

Then you accept evolutiopn. Really, that's basically all it is saying, things change over time. That's all, that's it, nothing more, simple as that.

I dont believe they develop into new species though (depending on what you define as a species).

You don't think small steps will eventually lead to something evtirely different?

For example, i was watching a nature program just tonight and they were looking at how the females are the ones who propel'evolutionary change' (as he called it) because they choose mates with the best traits.

Sexual selection, yes. This by no means drives all evolutionary change, keep that in mind.

Fair enough i can go along with that. But then he showed an example of a particular african fish where the male comes in a huge variety of colours. (not sure of the name of the fish)

Then he goes and spoils it all by calling every different coloured male a 'new species' ... "a brilliant example of evolution at work"

seriously, what is a species these days??? And why would he call the different colored males a new species???


No idea, I did not see the show, so can hardly comment on what he said. If all that was different was indeed the colour, and he did indeed say what you said he did, then I would have to question the programme's scientific accuaracy. But like I said, I didn't see it, so can't really comment.

{ABE}:After reading Wounded King's Message 75 seems I was rght, colour isn't the only difference. If it were indeed these fish.

So, we're now at this stage, you basically accpet evolution (your eally do Peg, evolution isn't what creationists say it is), yet you doubt it's ability to change things radically over a very long time. Now, why is that?

Edited by Huntard, : Added {ABE} bit

Edited by AdminModulous, : Sections not related to education hidden.


I hunt for the truth

I am the one Orgasmatron, the outstretched grasping hand
My image is of agony, my servants rape the land
Obsequious and arrogant, clandestine and vain
Two thousand years of misery, of torture in my name
Hypocrisy made paramount, paranoia the law
My name is called religion, sadistic, sacred whore.
-Lyrics by Lemmy Kilmister of Motorhead


This message is a reply to:
 Message 71 by Peg, posted 12-10-2009 6:13 AM Peg has responded

Replies to this message:
 Message 87 by Peg, posted 12-12-2009 6:54 PM Huntard has responded

  
Granny Magda
Member
Posts: 2301
From: UK
Joined: 11-12-2007


Message 83 of 126 (538808)
12-10-2009 8:57 AM
Reply to: Message 79 by Peg
12-10-2009 7:13 AM


Evolution and Origins
Granny writes:

So you would be happy to accept that Brahma might have made the first life?

Peg writes:

again, its not the issue.

I'm sorry, but it is.

You are ruling in one explanation for the origin of life; the Jewish creation story.

You are ruling out all other creation stories, any and all natural explanations...

On what basis can you say that one is compatible with evolution and another incompatible?

The main point that started me on this thread is simply this; evolution does not depend on any particular explanation for life's origin. Could you at least give me some kind of signal that you understand what I'm saying? Even if you disagree, it would be nice to know that you are getting my point here.

because the cambrian period shows a burst of life in great variety as opposed to a slow gradual increase

because the genetic code stops a plant or animal from moving too far from its parents appearance. There is great variety i agree(eg humans, cats, dogs) but not so much that one living thing could change into another...genetics and dna determine what a creature will look like, not random mutations.

because what we actually see in living things is stability and a limited range of variation

Again, we seem to be talking at cross-purposes. I didn't ask why you don't believe in evolution. I asked how you can demonstrate that evolution requires a natural origin. I'm trying to get at the fact that many possible origins are compatible with evolution, both natural and supernatural. Do you see where I'm coming from?

so you believe there is a chemical out there that has the ability to come to life?

The fact that life exists and that it is composed of chemicals proves beyond doubt that this is true. The only bone of contention is how life started. I am trying to show you that evolution is compatible with pretty much any origin, certainly it is compatible with a natural origin or a supernatural origin.

I wouldnt know, but im not going to base my world view on something that could be out there. I cant prove that its not out there...perhaps if scientists find it we will have the answer to abiogenesis.

Indeed, we should not believe what we cannot evidence. For my part, I don't believe in any particular origin of life. I have no idea what happened. I believe that a naturalistic explanation is more likely, but that's simply because every single other workable and well evidenced explanation for a phenomenon has been naturalistic. Supernatural explanations have an appalling track record in explaining the world. Historically, supernatural explanations have only ever been proved wrong. This alone is good enough reason to expect every phenomenon, including life, to have a naturalistic explanation. It is also the case that a number of reasonable naturalistic hypotheses exist regarding origins and progress is being made. It seems a little premature to rule them out and resort to "God-did-it" just yet.

Just another quick point; even if scientists create life in a lab tomorrow, we still won't be able to say definitively that this was how the original life arose. It might be, we wouldn't be able to tell for sure.

I believe that WK has answered your point about sterility.


Mutate and Survive

Edited by AdminModulous, : Sections not related to education hidden.


"A curious aspect of the theory of evolution is that everybody thinks he understands it." - Jacques Monod
This message is a reply to:
 Message 79 by Peg, posted 12-10-2009 7:13 AM Peg has responded

Replies to this message:
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Woodsy
Member (Idle past 785 days)
Posts: 301
From: Burlington, Canada
Joined: 08-30-2006


Message 84 of 126 (538882)
12-11-2009 11:28 AM
Reply to: Message 79 by Peg
12-10-2009 7:13 AM


Re: Do not mix science and religion
so you believe there is a chemical out there that has the ability to come to life?

What do you mean by "come to life"?

Do you think that life is a substance, or anything other than the result of certain arrangements of chemical compounds?

Chemicals "come to life" in the reproductive tracts of living things all the time.

Edited by AdminModulous, : Sections not related to education hidden.


This message is a reply to:
 Message 79 by Peg, posted 12-10-2009 7:13 AM Peg has responded

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Peg
Member (Idle past 2340 days)
Posts: 2703
From: melbourne, australia
Joined: 11-22-2008


Message 85 of 126 (539065)
12-12-2009 6:13 PM
Reply to: Message 80 by Wounded King
12-10-2009 7:19 AM


Re: Relatedness
Hi wounded king

Wounded King writes:

No it isn't, sterility doesn't really say anything about relatedness at all. One definition of distinct species is that when they mate they do not produce fertile offspring, this is post-mating reproductive isolation.

im not using the right word here and im not sure what you call it...im talking about 'sterility' in the sense that a cat and dog cannot produce offspring. I thought it was called sterility but obviously any individual can be sterile.
So if a cat and dog cannot produce offspring its because they are a different species and therefore they are not related. What do you call that?

Wounded King writes:

No, I don't think it is true, perhaps if you could be a bit more specific about what breeding experiments you mean I could give you a clearer answer.

the breeding experiments im talking about are the ones where scientists have tried to keep changing various animals and plants to try and develop new forms of life.

Here is a paper entitled 'Some biological proglems associated with natural selection' by Gerry Bergman

his paper is talking about the issue of species not crossing over to change into new species...here is an excerpt:

By natural selection is usually meant, ". . . the belief that random variation can, when subjected to selective pressure for long periods of time, culminate in new forms, and that it therefore provides an explanation for the origins of morphological diversity, adaptation, and when extended as far as Darwin proposed, speciation"

Now that researchers have a tremendous amount of experience in breeding animals, it is clear that it can be carried only to a very limited level, and many traits tend to revert to where we started-fruit fly traits, after eight to ten generations, tend to revert back to normal (Tinkle, 1976). The fact is, extensive breeding by millions of researchers and breeders has not produced a single undisputed new species in 400 years of experimenting (Johnson, 1991). As Eiseley (1958, p. 223) noted:

... careful domestic breeding, whatever it may do to improve the quality of race horses or cabbages, is not actually in itself the road to the endless biological deviation which is evolution. There is a great irony in this situation, for more than any other single factor, domestic breeding has been used as an argument for the reality of evolution.

Deevey (1967, p. 636) concludes, "Remarkable things have been done by cross-breeding ... but wheat is still wheat, and not, for instance, grapefruit. We can no more grow wings on pigs than hens can make cylindrical eggs." A more contemporary example is the average increase in male height that has occurred the past century. Through better health care (and perhaps also some sexual selection, as some women prefer taller men as mates) males have reached a record adult height during the last century, but the increase is rapidly disappearing, indicating that we have reached our limit.

Wounded king writes:

Offhand I say that almost all comparative genetics suggests you are completely wrong and in fact genetic similarity is probably the very best way to determine relatedness.

I agree that in some respects genetics can prove relatedness. But man and ape are said to be related and yet they cannot produce offspring...not even hybrids.... so how are they related?

Edited by AdminModulous, : Sections not related to education hidden.


This message is a reply to:
 Message 80 by Wounded King, posted 12-10-2009 7:19 AM Wounded King has responded

Replies to this message:
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DrJones*
Member
Posts: 1647
From: Edmonton, Alberta, Canada
Joined: 08-19-2004


Message 86 of 126 (539066)
12-12-2009 6:17 PM
Reply to: Message 85 by Peg
12-12-2009 6:13 PM


Re: Relatedness
I agree that in some respects genetics can prove relatedness. But man and ape are said to be related and yet they cannot produce offspring...not even hybrids.... so how are they related?

They are related through a common ancestor. They've evolved from this ancestor and are no longer inter-fertile.

Edited by AdminModulous, : Sections not related to education hidden.


It's not enough to bash in heads, you've got to bash in minds
soon I discovered that this rock thing was true
Jerry Lee Lewis was the devil
Jesus was an architect previous to his career as a prophet
All of a sudden i found myself in love with the world
And so there was only one thing I could do
Was ding a ding dang my dang along ling long - Jesus Built my Hotrod Ministry

Live every week like it's Shark Week! - Tracey Jordan
Just a monkey in a long line of kings. - Matthew Good
If "elitist" just means "not the dumbest motherfucker in the room", I'll be an elitist! - Get Your War On
*not an actual doctor
This message is a reply to:
 Message 85 by Peg, posted 12-12-2009 6:13 PM Peg has not yet responded

Peg
Member (Idle past 2340 days)
Posts: 2703
From: melbourne, australia
Joined: 11-22-2008


Message 87 of 126 (539067)
12-12-2009 6:54 PM
Reply to: Message 82 by Huntard
12-10-2009 7:48 AM


Re: Do not mix science and religion
huntard writes:

Or do you deny "variation"?
for sake of discussion, let's go with the "created kinds" here. Do you deny they can have "variation"?

not at all

we know what guides variation - genetics. We can see it and test it.

Huntard writes:

You don't think small steps will eventually lead to something evtirely different?

No i dont because its been proven over and over again as impossible.
Darwin did believe that animals could go in any direction and he believed that new species could be created by selective breeding.

but centuries of cross breeding have not produced any new species...none whatso ever. If we cant do it deliberately, what makes you think nature can do it accidently?

Huntard writes:

So, we're now at this stage, you basically accpet evolution (your eally do Peg, evolution isn't what creationists say it is), yet you doubt it's ability to change things radically over a very long time. Now, why is that?

because there is a species barrier....an internal law that stops a cat breeding with a dog or an ape breeding with a man

and as this papershows, breeding experiments bring animals to definite limits of improvement but no further.

also the fossil record shows animals unchanged for millions of years, and a sudden appearance of life in many forms in the cambrian period.

Edited by Peg, : No reason given.

Edited by AdminModulous, : Sections not related to education hidden.


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Replies to this message:
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Peg
Member (Idle past 2340 days)
Posts: 2703
From: melbourne, australia
Joined: 11-22-2008


Message 88 of 126 (539070)
12-12-2009 7:25 PM
Reply to: Message 83 by Granny Magda
12-10-2009 8:57 AM


Re: Evolution and Origins
Granny Magda writes:

Could you at least give me some kind of signal that you understand what I'm saying? Even if you disagree, it would be nice to know that you are getting my point here.

Yes, i do get the point. Evolution is the development of the species after life somehow appeared on earth.

But do you also understand that life must have begun on the molecular level before natural selection could have selected any animals to survive and reproduce offspring?

Granny Magda writes:

I asked how you can demonstrate that evolution requires a natural origin.

isnt a natural origin what evolution is all about? Isnt that why evolution is so fiercly contested by creationists?

Granny Magda writes:

I'm trying to get at the fact that many possible origins are compatible with evolution, both natural and supernatural. Do you see where I'm coming from?

Yes i can.

And if, by evolution, you are refering to the 'variations' found within a species, then i dont have a problem with it. I know species of animals develop over time and show different features.

But if your version of evolution includes the idea that species can develop so much change that they become a new species, then i dont believe that there is any evidence for that.

Granny Magda writes:

Supernatural explanations have an appalling track record in explaining the world. Historically, supernatural explanations have only ever been proved wrong. This alone is good enough reason to expect every phenomenon, including life, to have a naturalistic explanation.

I agree that many creation storys are rediculous...but not so with the bibles creation account which is why I accept it over other stories such as Brahman for instance.

The bible creation account shows animals created according to their 'kinds' and going forth to multiply. this is in perfect harmony with what breeding projects have found with regard to species. Species reproduce according their parents.

Edited by AdminModulous, : Sections not related to education hidden.


This message is a reply to:
 Message 83 by Granny Magda, posted 12-10-2009 8:57 AM Granny Magda has not yet responded

Replies to this message:
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Wounded King
Member (Idle past 1505 days)
Posts: 4149
From: Edinburgh, Scotland
Joined: 04-09-2003


Message 89 of 126 (539071)
12-12-2009 7:34 PM
Reply to: Message 85 by Peg
12-12-2009 6:13 PM


Re: Relatedness
im not using the right word here and im not sure what you call it...im talking about 'sterility' in the sense that a cat and dog cannot produce offspring. I thought it was called sterility but obviously any individual can be sterile.

Even if you use more accurate terminology such as 'interfertility', the reproductive compatibility of two organisms to produce viable fertile offspring. It doesn't change the fact that interfertility is not a measure of relatedness, only of specific genetic compatibility. In some cases genetic incompatibility can be established by very few mutations, which is why it isn't a good measure of relatedness.

The essential reason why a cat and a dog can't successfully interbreed and why 2 genetically incompatible people cant interbreed is the same, genetic incompatibility, in the case of the cat and dog the incompatibility is considerably wider spread because they have had time to evolve in different directions since they last had common ancestors within one breeding population. Over this time their chromosomal organisation may have changed significantly, including the number of chromosomes, the arrangement of genes on the chromosomes and the specific genes themselves. All of these differences may contribute to the genetic incompatibility.

the breeding experiments im talking about are the ones where scientists have tried to keep changing various animals and plants to try and develop new forms of life.

Oh, you mean fictional ones made up by creationists, thanks for clearing that up. None of the things Bergman refers to were experiments with the intention of developing 'new forms of life'.

But man and ape are said to be related and yet they cannot produce offspring...not even hybrids.... so how are they related?

Just blindly repeating the same question doesn't help, They are genetically related, you just agreed genetics can tell us about relatedness, but now you are taking it back and saying it can't because ... well no reason really, except that you don't like evolution. I have explained twice now that producing offspring is not the measure of relatedness, do you get it yet? No matter how often you try to claim it is you will never be right.

If we cant do it deliberately, what makes you think nature can do it accidently?

Apart from creationist lies what make you think people have been trying to do it deliberately? Plus nature has had a lot longer and a lot more resources.

But if your version of evolution includes the idea that species can develop so much change that they become a new species, then i dont believe that there is any evidence for that.

Thats because you think becoming a new species means a cat will become a dog because you're understanding of evolution is based on creationist propaganda rather than, say, actual evolutionary theory.

this is in perfect harmony with what breeding projects have found with regard to species. Species reproduce according their parents.

That is what evolution says as well, it just also says that the offspring can differ slightly from their parents which is indeed what we see.


TTFN,

WK

Edited by AdminModulous, : Sections not related to education hidden.


This message is a reply to:
 Message 85 by Peg, posted 12-12-2009 6:13 PM Peg has responded

Replies to this message:
 Message 90 by Peg, posted 12-12-2009 8:23 PM Wounded King has responded

  
Peg
Member (Idle past 2340 days)
Posts: 2703
From: melbourne, australia
Joined: 11-22-2008


Message 90 of 126 (539075)
12-12-2009 8:23 PM
Reply to: Message 89 by Wounded King
12-12-2009 7:34 PM


Re: Relatedness
Wounded King writes:

That is what evolution says as well, it just also says that the offspring can differ slightly from their parents which is indeed what we see.

that is not only what evolution says

it also says that the offspring will continue to go thru changes until it is so different from its parents that it becomes a new species

Darwin said "favorable variations would tend to be preserved and unfavorable ones destroyed. The result of this would be the formation of new species."

and that is Not what we see.

Edited by AdminModulous, : Sections not related to education hidden.


This message is a reply to:
 Message 89 by Wounded King, posted 12-12-2009 7:34 PM Wounded King has responded

Replies to this message:
 Message 97 by Wounded King, posted 12-13-2009 4:38 AM Peg has not yet responded

  
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