Question

Why do all the gametes formed in human females have an X chromosome?

Answer 1

Homogametes in females:

1. Human females are homomorphic.
2. They have two sex chromosomes that are identical.
3. One X-chromosome enters each gamete during meiosis at the time of gamete formation.
4. So all gametes have an X-chromosome.
5. The females are thus homogametic.
6. It means that all gametes produced have only one type of sex chromosome, the X chromosome.
7. Among the two X chromosomes, one is inactive and the other is active.
8. The inactive X-chromosome forms the bar body.