What would have happened if meiosis not occur during the production of human sperm cell and egg cell?

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Solution

Meiosis occurs for a reductional division and the chromosome no. in the gamete becomes haploid.
This is important to retain the diploid chromosomal number after fertilization of the gametes to form a zygote.
If the diploid no.is not retained then the zygote is unviable due to an incorrect set of chromosomes which are not associated with the species.

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(a) Mitosis occurs in our ..... cells.
(b) Mitosis produces two daughter cells whereas meiosis produces ...... daughter cells.
(c) Meiosis occurs only in ..... cells.
(d) Modern humans have 46 chromosomes. Their sperms and eggs will have......chromosomes each.
(e) During the pairing of chromosomes in meiosis, the ...... chromosomes come to lie side by side.
(f) The.......(s) are surrounded by radiating rays and termed as aster.

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Q. What would have been happened if any of the cells in nature had not been divided by meiosis?

Q. The process of human spermatogenesis produces four sperm cells. Of the four cells produced, two of them have 20 chromosomes, and two of them have 26 chromosomes. The non-disjunction that caused the cells to have an unbalanced chromosome number probably occurred during which stage of meiosis?

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