Recent studies on the genetic factors that influence gender traits
For a long time, biologists believed that the female form was the default template for the mammalian fetuses of both sexes,
After the discovery of the testis-determining gene sRY many scientists shifted to the theory that the genetic mechanism that determines a fetus to develop into a male form was initiated by the SRY gene, which was thought to be responsible for the production of testosterone and its overall effects on body and brain development.