Question

How is the equal genetic contribution of male and female parents ensured in the progeny?

Answer 1

In reproduction process ,the gametes of both the parent participate.These gametes are produced by meiosis ,thus contain half no of chromosomes (n).During fertilisation genetic material of both the gamete combines as sperm and ova fertilise leading to formation of zygote with half chromosomes of female and half of male one.                                                                                    sperm(n)  +  egg(n)   →   zygote(2n)

Answer 2

Equal genetic contribution of male and female parents in the progeny is ensured by the equal inheritance of chromosome from each parent. Human possesses 23 pairs of chromosomes, of which 22 pairs are autosomes and 1 pair is the sex chromosomes.