Zygote is the diploid cell that results from the fertilization between an egg and a sperm. Etymology. Came from the Greek word âgametesâ meaning âhusbandâ and âgameteâ meaning âwife.â. Came from the Greek word âzygotosâ meaning âjoined or yoked or to yoke.
This is not causation, but facilitation after the fact. Stating that estrogen causes breast cancer is like saying fertilizer causes weeds. In a garden even weeds need some soil nutrients, and if these are completely removed, the weeds can't grow...but neither can the desired plants.
Estrogen is produced by the ovaries in women, while in men it is produced by the Sertoli cells of the testes and helps prevent apoptosis (programmed death) of sperm cells. There are three categories of âestrogensâ that occur naturally: Estrone (E1) â produced during menopause.