In fact, all living beings have evolved as hermaphrodites. It's just that some hermaphrodites were better at pro genesis. So their female characteristics were favoured and encouraged by nature. When a baby is conceived , it has got potential of becoming both male or female. But a very tiny gene on Y chromosome codes for secretion of testosterone at certain stage of embryo genesis & that is what leads to enhancement of a particular set of sexual organ. All women have mullerian ducts which are remnants of male sexual organs & all men have wolfian ducts which are remnants of female sexual organs.
In fact, all living beings have evolved as hermaphrodites. It's just that some hermaphrodites were better at pro genesis. So their female characteristics were favoured and encouraged by nature. When a baby is conceived , it has got potential of becoming both male or female. But a very tiny gene on Y chromosome codes for secretion of testosterone at certain stage of embryo genesis & that is what leads to enhancement of a particular set of sexual organ. All women have mullerian ducts which are remnants of male sexual organs & all men have wolfian ducts which are remnants of female sexual organs.