Question

It is a matter of chance whether a couple will give birth to a male child or a female child." Justify this statement with the help of a flow chart showing the fusion of sex chromosomes.

Answer 1

XX  will give X and X chromosomes
XY will give X and Y chromosomes
The X chromosome from mother can either fuse with X or Y chromosome from the father.
So it is by chance the a male or female is born.