Question

A husband has 46 chromosomes. His wife has 46 chromosomes. Then why does not their offspring has 46 pairs o
chromosomes which is obtained by fusion of male and female gametes. Support your answer with illustration.
Gametogenesis is not a mitotic division. It is a meiotic division. Therefore, gametes do not possess the sam
ns​

Answer 1

Expert Answer:

Every human cell has 23 chromosomes and is haploid .

The zygote is formed when the male nucleus (23 chromosome) unites with the female nucleus(23 chromosome) and the zygote formed is diploid (contains 23 pairs of chromosome).

The zygote undergoes a series of mitotic cell division a process known as cleavage and results in haploid cells being formed and thus the number of chromosomes restored to 23 chromosomes .i think this will helpfull

Answer 2

Their offspring do not have 46 pairs of chromosomes because:

• Male has 46 chromosomes and female also has 46 chromosomes.
• Reduction division or meiosis in male and female gametes reduces the chromosome number to half which is 23 chromosomes.
• Now, male and female gamers fuse to form zygote which is a diploid cell and contains 46 chromosomes not 46 pairs of chromosomes.
• Chromosomes - 23(male) + 23(female) = 46(offspring).
• The zygote undergoes mitosis or equations division and remains in the same number of chromosomes.

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