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I've heard claims that favourable genes get through the global human population rather quickly, 100s of years. Neanderthal genes have had a long, long time to

by b112 2y ago

I've heard claims that favourable genes get through the global human population rather quickly, 100s of years. Neanderthal genes have had a long, long time to do so. (Note the key "favourable")

andrewflnr 2y ago
That seems highly dubious. The global human population isn't that well connected, or at least wasn't until recently. And single genes aren't that easy to isolate, so if they could travel that quickly we would also see all kinds of more visible traits moving around, but instead for most people we can get a decent idea of their genetic heritage looking at their face.