Back in 2003 I wrote this post about how DNA can reveal people to have very different genetic backgrounds than what their ethnicity might otherwise tell them. Today the New York Times offers some more stories. Genia Stevens provides a short summary:
A group of college students in Pennsylvania recently took a DNA test and were quite surprised by the results. One Black student realized he’s 52 per cent African and 48 per cent European, even though both his parents are Black. Of the 100 students tested, half of them were white. Each of the white students said they wanted to find out they were something other than white — just to piss off their parents.
His new project is to blitz the whole world for DNA … and come up with a definitive mapping of human migrations. His results so far indicate that humans left Africa 60,000 years ago and migrated throughout the world.
That date is somewhat controversial, but hopefully this data will help clear things up.