Biologists have constructed a genetic map of Europe showing the degree of relatedness between its various populations.
All the populations are quite similar, but
the differences are sufficient that it should be possible to devise a forensic test to tell which country in Europe an individual probably comes from [but but but...race does not exist!], said Manfred Kayser, a geneticist at the Erasmus University Medical Center in the Netherlands.
http://www.nytimes.com/2008/08/13/sc...nt&oref=slogin