. Mention the role of gamete and zygote in sexually reproducing organisms

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Ans. Sexual reproduction takes place by  the combination  of special  reproductive cells called sex cells. These cells are of two types-male sex cells and female sex cells, which are coining from two  different  parents-a male  and  a  female.  The cells involved in sexual reproduction are called gametes. In sexual reproduction, a male gamete fuses with a female gamete to form a new cell called zygote. This zygote then grows and develops into a new organism in due course of time