[allmendream]

Once again, the example of a change that can happen WITHIN a species, is perfectly applicable to the change that will happen during speciation. There isn't one type of mutation that happens within a population and a different kind that happens during speciation; speciation is the accumulation of these changes within separate populations until the two populations no longer look or act the same and can no longer reproduce together.

Obviously in the case of sickle cell anemia this did not lead to speciation, but there was ABSOLUTELY no such requirement that the mutation happen in two different individuals for for them to meet and reproduce for this change to be introduced into the population.

That is what we are discussing here, changes introduced into a population. And the example I provided showed that no such criteria as was suggested is needed to explain how DNA changes are introduced into a population.

So once again the Creationist argument is based upon nothing but ignorance.

If there are two separated populations of the same species, what is going to STOP this accumulation of change until these two populations are no longer able to reproduce fertile offspring?

[reasonisfaith]

I think one major problem we’re having here is that neither the genetic nor the evolutionary processes of speciation can be precisely described.