Question

Why does only 1 of 4 eggs mature?
in a human

Answer 1

In female mammals (humans too) 3 of the gametes do not mature with a full yoke sack. Only 1 of the 4 can become a mature egg. All mature eggs are formed to a certain stage in the first division.
In male mammals (humans too) all 4 gametes mature into sperm cells. The male is continually forming these after birth.

Answer 2

thanks :)

Answer 3

ur welcome :)