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  • The number of chromosomes in parents and offsprings of a particular species remains constant due to (a) doubling of chromosomes after zygote formation (b) halving of chromosomes during gamete formation (c) doubling of chromosomes after gamete formation

The number of chromosomes in parents and offsprings of a particular species remains constant due to
(a) doubling of chromosomes after zygote formation
(b) halving of chromosomes during gamete formation
(c) doubling of chromosomes after gamete formation
(d) halving of chromosomes after gamete formation

Answers (1)

Solution: Meiosis is the process by which the number of chromosomes in each gamete is cut in half during gamete production. Two rounds of cell division follow DNA replication in meiosis, producing four daughter cells with half as many chromosomes as the parent cell. The zygote that results from the fertilisation of a male and female gamete fuses has the same number of chromosomes as its parents. The original number of chromosomes is therefore restored. Hence, (b) is the correct option.

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