[Ahban]

The mutational burden, so to speak, of the human-chimp difference doesn't rest on the human branch alone. The chimp branch also diverged from a common ancester.

True, and Condorman pointed that out. jennyp already had that one covered though, she is using 10 million year divergence instead of five million to take into account that you have two groups that are diverging. All of these estimates that we are making have that factored in.

Along with "C", I will be glad to take a look at any link you have on human mutation rates. I would especially like to know about the FIXATION of such mutations in the population.

I don't mean the fixation of some existing Alelle in some sub population, but a truly novel mutation establishing itself in a group. That is what we need to know, not just the mutation rate, but the novel mutation rate, and not just the novel mutation rate, but the fixation rate.

[Nebullis]

All of these estimates that we are making have that factored in.

Molecular clock estimates range from 5-8 million years from the human-chimp ancestor. A conservative estimate of 5 million years ignores the recent circa 7 million yo hominid find. It doesn't change much regarding the estimates of about 1% difference in coding regions between chimps and humans. That difference is perfectly reasonable with what we know about mutation rates.

I would especially like to know about the FIXATION of such mutations in the population.

I invite you to do your own homework. You might not be aware, but within that percentage difference, neutral substitutions, that is, mutations that are not fixed, are included.