Brutish and short? DNA 'switch' sheds light on Neanderthals

April 17, 2014 6:05 PM

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NEW YORK (Reuters) - How can creatures as different in body and mind as present-day humans and their extinct Neanderthal cousins be 99.84 percent identical genetically?

Four years after scientists discovered that the two species' genomes differ by a fraction of a percent, geneticists said on Thursday they have an explanation: the cellular equivalent of "on"/"off" switches that determine whether DNA is activated or not.

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