Gametes are produced in the ovaries and testes of animals by meiosis which:
- produces haploid cells (contain half the number of chromosomes found in a body cell: one of each homologous pair)
- creates genetic variation among offspring
During meiosis, pairs of homologous chromosomes line up at the equator.
As either of the pair can end up at either pole (random assortment), genetically variable gametes are produced.