Gametes are reproductive cells that unite during sexual reproduction
to form a new cell called a zygote. In humans, male gametes are sperm and female gametes are ova (eggs). Sperm are motile and have a long, tail-like projection called a flagellum
. Ova however, are non-motile and relatively large in comparison to the male gamete.
Gametes are produced by a type of cell division called meiosis
. They are haploid
, meaning that they contain only one set of chromosomes
. When the haploid male and female gametes unite in a process called fertilization, they form what is called a zygote. The zygote is diploid
and contains two sets of chromosomes.