Question

Father is responsible for the sex of the child and not mother. Explain

Answer 1

Father is responsible for the sex of the child and not the mother because in humans there are 23 pairs of chromosomes of which the 23rd pair are sex chromosomes which are of two types- X and Y . The ovum consists of the X chromosome and the sex chromosome in a sperm maybe either X or Y.

If a sperm containing an X chromosome fertilizes the egg, the zygote woul have two X chromosome and would develop into a female.

If the sperm fertilizing the egg contains a Y chromosome, the zygote would have one X and one Y chromosome and would develop into a male. Therefore, the sex chromosome in the sperm of the father determines the sex of the child.