Loss of the Y chromosome in aging men is widespread and increasingly linked to serious diseases, challenging assumptions that the Y has little biological importance beyond sex determination.
New research reveals that ancient interbreeding between humans and Neanderthals shaped our modern human DNA - especially on the X chromosome.
For years, geneticists have wrestled with a curious absence: many modern people carry Neanderthal DNA, yet large stretches of the human X chromosome are almost empty of it. A new study argues that ...
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