vinces99 writes "A substantial fraction of the Neanderthal genome persists in modern human populations. A new analysis (abstract) of 665 people from Europe and East Asia shows that more than 20 percent of the Neanderthal genome survives in the DNA of this contemporary group, whose genetic information is part of the 1,000 Genomes Project." Another study published today (abstract) finds that Neanderthal genes are present in some parts of our genome that we've found to be important. Some of the genes influence fertility and skin pigment, and others actually increase our susceptibility to diseases like diabetes and lupus. The researchers are now taking these known genetic markers and seeing if they correlate with any other health conditions.
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