Question

Meiosis is an essential event in the sexual cycle of any organism. Give two reasons.? [Foreign 2015; HOTS]

Answer 1

Answer:

Meiosis is a form a reductive cell division whereby the daughter cells have half the number of chromosomes as the mother cell. This is vital as halving the chromosome number during gamete formation balances the doubling effect of fertilisation. Meiosis is also responsible for introducing genetic variation into gametes which is important for the survival of the species. It does this during crossing over in prophase one and via random assortment of chromosomes during metaphase.

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Explanation:

Answer 2

Meiosis is an essential event in sexual life cycle of any organism. The following are the reasons :-

• It reduces the number of chromosomes in the gametes to half.
• It helps in maintaining the number of chromosomes constant in organisms.