Of course it would, because as generations go by, their genetic makeup will slowly evolve into something else. But, as long as that particular bloodline/population continues to be subjected to a particular stimulus, then those traits will remain for the short term. And, by short term, I mean for the first several generations, maybe even a several hundred years, as with the Western African decendents here in the States. It seems obvious to me, those traits which were passed down by there forefathers hundreds of years ago, still play a major role.