Question

It was observed that in a family a woman has only daughters. analyse on the basis of genetics andgive an explaination

Answer 1

The woman has only Daughters because each time when fertilisation happens, the x chromosomes from the woman fertilises with the x chromosomes of the man. If it had fertilised with the y chromosomes of the man, then the woman would have a male child.
Thus, Gender of the offspring depends upon the type of chromosomes released by the man.