Every cell in our body has a sex. But most research so far has focused on our gonads—ovaries or testes—and not on the early development of the brain. Per-Erik Olsson, professor of biology at Örebro ...

Researchers have uncovered unexpected diversity in the genetic processes that determine the sex of the African clawed frog, a significant discovery in what was already one of the most widely studied ...

Most people assume that our genes determine the characteristics that make males and females distinct from each other: sex organs, secondary sex characteristics, personality, behavior, and even ...