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Author Topic:   The Electric Eel - more evidence against evolution
PaulK
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Posts: 17825
Joined: 01-10-2003
Member Rating: 2.2


Message 27 of 101 (704316)
08-08-2013 1:26 PM
Reply to: Message 17 by Genomicus
08-08-2013 10:36 AM


Re: another rather typical misconception
quote:
If natural selection is out of the equation, then only traits that can be easily arrived at through a probable combination of mutations will "jess keep cummulating."
Not exactly. Neutral drift will ensure that changes keep accumulating at the genetic level. And as the number of changes accumulates the probability of getting a trait which requires a particular number of mutations or more can be a lot higher than the probability of getting a particular trait.

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 Message 17 by Genomicus, posted 08-08-2013 10:36 AM Genomicus has replied

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PaulK
Member
Posts: 17825
Joined: 01-10-2003
Member Rating: 2.2


Message 32 of 101 (704321)
08-08-2013 1:38 PM
Reply to: Message 29 by Genomicus
08-08-2013 1:33 PM


Re: another rather typical misconception
quote:
Correct. I didn't get into the whole population genetics aspect of this.
But they mean that traits will just keep accumulating - although much slower. It also means that there is no simple probability bound that can be applied. It will depend on time, the number of genes, and the number of possible phenotypic variations within range of the genetic change that has occurred.

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PaulK
Member
Posts: 17825
Joined: 01-10-2003
Member Rating: 2.2


Message 35 of 101 (704325)
08-08-2013 1:52 PM
Reply to: Message 34 by Genomicus
08-08-2013 1:44 PM


Re: another rather typical misconception
quote:
Right -- but if those traits require a large number of specific mutations (each of which are individually neutral; i.e., they only offer a selective advantage when they are all present), then it will be quite a long time before each of those specific mutations are fixed in the population, or are even all present in an organism. There is an extremely large number of possible "mutation combinations" that are never fixed in a population.
Sure and if you can find an example that had to have evolved in a short period of time then maybe you'll have an example. But you have to actually find one.

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