Gametes are formed through meiosis (reduction division), in which a germ cell undergoes two fissions, resulting in the production of four gametes. ... During fertilization, male and female gametes fuse, producing a diploid (i.e., containing paired chromosomes) zygote.

How are gametes produced?

Gametes are produced by mitosis (not meiosis) and after fertilization a diploid zygote is created. The single zygote cell never grows or divides my mitosis. It can only divide by meiosis to produce haploid cells once more, which then produce the main adult body.

Where are gametes made?

Gamete production in the testes

The testes are the site of gamete production in males. The male gamete is called sperm. It is produced in the seminiferous tubules and testosterone is produced in the interstitial cells.