Good point. I guess the prevalence of the genes in the existing population could explain it. If we took some Europeans and and left them to interbreed in South

Good point. I guess the prevalence of the genes in the existing population could explain it. If we took some Europeans and and left them to interbreed in South Africa for 2 millennium we'd probably find much less neanderthal DNA than in their now distant cousins in Europe. Or more likely is that my simple mathematical thought model breaks down with real world genetics. Any geneticists in the house?