Ancient virus determines babies' gender
New Haven, Conn. (UPI) Mar 31, 2016 -
Over the course of human evolution, the human genome has picked up foreign fragments of DNA, mostly from ancient viruses.
The majority of those fragments are inactive, but a few serve novel purposes - like determining the sex of a developing embryo.
Yale researchers believe an ancient viral DNA strand - incorporated into the mammalian genome as recently as 1.5 million years ago ...
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