Re: What prevents evolution?
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The mutual infertility of the individuals within group B increases according to the same genetic drift that underlies the development of mutually fertile group A into (prospectively) mutually fertile group B.
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Infertility with respect to whom?
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Each other.
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Each other at the individual level?
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Yes.
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Are you being vague on purpose?
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No.
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Then who do they mate with?
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That's just my point.
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How many generations would you say this infertility takes to get to?
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About the same number of generations separating the mutual fertility of group A and group B.
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So you have a group of individuals where none of them can mate with each other?
And in the 2nd response, where do you get that idea from?
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