Most people are sure that the Y-chromosome makes a man a boy and a man, and her absence guarantees the development of the girl and the woman.
Indeed, in the typical case of male development, the SRY gene located at the tip of the Y chromosome helps guide the formation of the embryo along the male pathway. But, for example, there is a factor that is much larger than SRY, is necessary for determining sex.
These are the androgen receptors. If they are not present, the cells are unable to respond to the effects of sex hormones. Such a state of naming