尼安德特男性与现代人类女性配对

X chromosomes in both kinds of human testify to ancient mating bias BRIDGET ALEX F or more than a decade, it’s been known that ancient members of our species, Homo sapi- ens, met and mated with our evolutionary cousins, Neanderthals. Traces of the affairs linger: Today, up to 2% of the genomes of people outside sub-Saharan Africa originated from Neanderthals. But the details of the encounters have remained a matter of speculation. derthals vanished. Hardly any of it can be found along our X chromosomes, one of which is always inherited from the mother. In contrast, autosomes— the nonsex chromosomes numbered 1 through 22—contain on average five times more Neanderthal DNA than the X chromosomes in people today. …