genetic diversity (was Newsweek)

Henry T Robertson (
13 Feb 1995 20:04:58 GMT

In article <>,
Anthony L. Lang <> wrote:

>They are referring to the other 94% of genes that don't vary
>among populations of humans. Certain genes that control
>morphology and physiology do differ among people from
>different parts of the world (the 6% referred to above)
>but others do not (the other 94%). This is not
>to say that the latter genes
>do not have variation. They do, but the genetic variation
>exists in all populations of the world. For example,
>A, B, and O genes for blood type exist in all populations
>(although, I have to admit that some types are rarer in
>some populations than in others).

What is it that causes non-genetic DNA to differ when new species emerge
through genetic isolation? Humans and chimps have common ancestors,
yet today a human-chimp couple cannot reproduce due to the different
number of chromosomes among other things. There is more than just genetic
differences between humans and chimps. Or has science not yet figured that out?