What is the chance that a human zygote will receive one X and one Y sex chromosome during fertilization?
1 Answer
Jan 18, 2017
50% or 1/2
Explanation:
The human zygote is formed by two half cells one from the female and one from the male.
The female sex cell , has two X chromosomes (X,X) so can only donate an X chromosome.
The male sex cell has one X chromosome and one Y chromosome.
The male can donate an X chromosome or a Y chromosome.
So there is one chance out of two that the zygote will have XX and one chance out of two that the zygote will have XY and be male.
