How does sex determination happen in human?

Explanation

1. Each human cell contais 23 pairs (46) of chromosomes.
2. Out of 23 pairs, 22 pairs of chromosomes are alled autosomes
3. Remaining one pair is c alled allosomes or sex chromosomes.
4. There are two types of sex hromosomes one is 'X' and the other is 'Y'
5. These two chromosomes determine the sex of an individual.
6. Females have two 'X' chromosomes in their cells (XX).
7. Males have one 'X' and one 'Y' chromosomes in their cells (XY).
8. All the gametes produced by women (ovum ) will be with only X chromosomes
9. the gametes produced by man (sperm ) will be of two types, one with X chromosomes and other with Y chromosomes
10 If the sperm carries X chromosome and fertilizes the ovum, the resultat baby will have XX condition. So the baby will be a girl
11. If the sperm carries Y chromosome and fertilises with the ovum, the resultant baby will have XY condition so the baby will be a boy.