Question

Explain how the sex of a child is determined at the time of conception?

Answer 1

ANSWER --- >> In humans beings sex is determined by a pair of chromosomes called sex chromosomes. Sex complement of a female is XX while that of a male is XY. The complement is formed at the time of fertilization of the ovum by the sperm, i.e. conception. The ovum is always of one type, 22 + X. Sperms are of two types, gynosperms (22+X) and androsperms (22+Y). Fusion of an androsperm (22+Y) with an egg (22+X) produces a zygote (44+XY) that will develop into male baby. Fertilization of an ovum (22+X) with a gynosperm (22+X) will form a zygote (44+XX) that grows into female baby. Sex of the child cannot be changed afterwards by any method. It is determined at the time of conception.