How do gametes differ from somatic cells?

Gametes are your sex cells. They go through Meiosis. Somatic cells are every other cell in your body and they go through Mitosis.

Other cells are somatic cells-regular body and organ cells. Also, gametes have half the number of chromosomes as somatic cells do. This is because, when the zygote is formed (sperm and egg form together) they take their chromosomes together to make the number of chromosomes a somatic cell has. Gametes are sex cells-sperm and egg.