The Biology of #Homosexuality

How is one's sexual orientation is determined? How it is possible for one identical twin to be gay and the other to be straight? National Geographic explains and explores a new field of study, called Epigenetics.

NatGeo explains how one's sexual orientation is determined during embryonic development. They look at how it is possible for one identical twin to be gay and the other to be straight. They address a new branch of Genetics called, Epigenetics.