[Auntie Dem]

I'm obviosuly not a geneticist, and may have misunderstood some of the "facts" of the article, but why would only the DNA of the Asians that migrated to the Americas mutate? Wouldn't the DNA of the Asians that stayed behind mutate the same way?

It seems to me what happened is the Asians that migrated to the Americas interbred with others who were either already here, or came later. That combination with a completely different line of DNA contributed more to the change in the "Asian" DNA than did mutations.

[blam]

"That combination with a completely different line of DNA contributed more to the change in the "Asian" DNA than did mutations."

I think we probably have numerous cases of 'founders effect.'