Science
How is the equal genetic contribution of male and female parents ensured in the progeny?
Genetics
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Answer
During gamete formation the cell divides by meiosis giving four haploid (n) cells. The normal number of chromosomes in human a cell is 46 i.e. 23 pairs. The gamete cells, therefore, formed after meiosis have 23 chromosomes each. When fertilization occurs, the male gamete and female gamete fuse together and the original number of chromosomes is restored. This means that the zygote has 46 (23+23) chromosomes — 23 from male gamete and 23 from female gamete. This is how the equal genetic contribution of male and female parents is ensured in the progeny.
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