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givesomefuckswhy is there so little Neanderthal DNA on the X chromosome of modern humans? The researchers considered two hypotheses. The first is that the Neanderthal genes on this chromosome were detrimental to our species and were eliminated by natural selection. The second hypothesis is that the Neanderthal X chromosome never became established in our genetic makeup because interbreeding occurred primarily between Neanderthal males and Homo sapiens females: the sons of these couples would have inherited the X chromosome from their human mother, not their Neanderthal father.
The simple explanation is that one of the main advantages humans had, was how fast we could pump out babiesâŚ
Even if cross species pairing happened at an equal rate, the neanderthal males and human females would reproduce at a rate as high as human/human.
But neanderthal females and human males would reproduce as slowly as neanderthal/neanderthal couples.
Because neanderthal genes on a Y chromosome didnât have negative select rated of lowered birth rate, thatâs obviously where theyâd hide out the longest.