Genes Determine Gender
A baby’s sex is determined at conception (when the sperm fertilizes the ovum), but at first both female and male embryos develop in exactly the same way and they have identical genital parts until around the eighth week of gestation, when males and females start to develop in different ways. There is an unexpectedly small number or genes that determine the differentiation male/female: in the nucleus of every cell of our body there are 46 chromosomes, organized
