Explain why it is important that the number
of chromosomes is halved when gametes are
formed.

When the male and female gametes combine in fertilization they create an embryo with the full complement of chromosomes

If these gametes had the same number of chromosomes as the parent does, each generation would have double the chromosomes as the previous generation did. To prevent that, meiosis occurs in the gonads--ovaries or testes.

Explanation:

a unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring.

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