Spermatogonium

Spermatogonium is a class made up of all of the spermatogenic cells. Each of these contains forty-six chromosomes in its nucleus. During early adolescence, certain hormones stimulate spermatogonia to become active. Some undergo mitosis (dividing into two daughter cells), giving rise to new spermatogonia and providing a reserve supply. Others enlarge and become primary spermatocytes that then divide by a special type of cell division called meiosis. In the course of meiosis, the primary...