Gametes are specialized cells involved in sexual reproduction. In humans and many other organisms, there are two types of gametes: sperm and eggs. Sperm are produced by males and are typically small and mobile, while eggs, produced by females, are larger and contain nutrients to support early development. When a sperm fertilizes an egg, they combine their genetic material to form a new organism. The process of creating gametes is called gametogenesis. In humans, this occurs in the testes for sperm and the ovaries for eggs. Each gamete carries half the genetic information needed for a new individual, ensuring genetic diversity in the population.