Doubt by Praveen

Sir it is said that males are responsible for the sex of the baby in humans . My question is that when during insemination large amount of sperm is inseminated to female body , do do all the sperm in semen at that time contain same type of chromose ??or both X or Y are  present ?? And if the answer is both x and y than my question is if both are present and we know that there is large amount of sperm in semen out of which only 1 reaches ti ovum and fertilise it which contain either x or y and that is not under control of anyone that out of million only a particular make ovum fertilise so is it correct to say that men is responsible or the statement should be that a baby should be either a girl or a boy and no male or female is responsible it is just by chance that what kind of sperm is fertilising it .

Answers

Answer by Isha Agarwal

Neither parent gets to decide. Almost everyone has around a 50% chance of having a boy and a 50% chance of having a girl.

What we can say is that dad's sperm determines whether a baby will be a boy or a girl. About half of his sperm will make a boy and half a girl. The sex of the baby depends on which sperm gets to the egg first. It would all be up to chance. Both types of sperm would have an equal chance of reaching the egg first. And once fertilized, each type of egg would have an equal chance of developing fully into a baby.

When an egg or sperm is made, it only gets one of the sex chromosomes from the parent. This means that women can only make eggs with an X chromosome. But men can make either X or Y sperm. During fertilization, the sperm cells race toward the mother-to-be's egg cell. If a sperm with a Y beats all others, then the fetus will be XY. The pregnancy will result in a boy. However, if a sperm with an X wins the race to the egg, then the fetus will be XX. The parents will have a baby girl.