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flag Ancient interbreeding likely involved female humans and male Neanderthals, per DNA study.

flag A new study in Science finds that ancient interbreeding between modern humans and Neanderthals likely involved more female humans mating with male Neanderthals, based on a shortage of Neanderthal DNA on the human X chromosome. flag Researchers say this pattern suggests asymmetric mating, possibly due to biological or social factors, though the exact reasons remain unknown. flag The findings, based on ancient DNA analysis, support earlier evidence that Neanderthal genes in modern humans influence immunity and disease risk.

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