What are gametes?
Gametes are cells specialized in sexual reproduction. They have half of the maximum number of chromosomes of the species and unite with another gamete giving birth to a zygote with double of the number of chromosomes of the gametic cells.
In humans gametes are produced by meiosis; the male gametes are the sperm cells and the female gametes are the egg cells.
Gametogenesis - Image Diversity: sperm cells egg cells