Tag: placental mammals

Junk DNA Gave Us the Modern Uterus, in a Giant Genetic Cut-and-Paste Operation

By Veronique Greenwood | September 27, 2011 8:00 am

What’s the News: A new analysis finds that many of the genes behind the development of modern mammalian pregnancy are controlled by mysterious genetic elements called transposons, long referred to as “junk DNA.” The results suggest that the placental uterus did not evolve gradually but instead arose from a massive, transposon-driven genetic rewiring.

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