Fertilisation
In sexual reproduction, a male gamete and a female gamete join together. This is fertilisation.
Female gametes are called The female reproductive cell. and are produced in the ovaries of the female mammal.
In human beings, each gamete contains 23 chromosomes, half the number found in the other cells of the body. When the male and female gametes fuse, they become a zygote containing the full 46 chromosomes, half of which came from the father and half from the mother.
The A fertilised egg cell. divides to form two new cells, which then continue to divide many times. Many of the new cells produced become specialised to perform particular functions and form all the body tissues of the new individual.