Question

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

Answer 1

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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)

Hope it will help you.

Answer 2

Answer:

During gamete formation, each gamete receives half the number of chromosomes i.e. 23. During sexual reproduction, a female gamete (having 23 chromosomes) fuses with a male gamete (having 23 chromosomes) to form zygote. Zygote is diploid which contains 23 chromosomes from mother and 23 from father. In this way, an equal genetic contribution of male and female parents is ensured in the progeny.