Question

It was observed that in a family a woman has only daughters. Analyse on the basis of genetics and give explanation .​

Answer 1

Answer:

If the family has only daughters, it does not necessarily imply that the mother has the genetical defect. A male has one X chromosome and one Y chromosome (XY). Therefore, half of the male gametes or sperms will have X chromosomes and the other half will have Y chromosomes. A female has both the X chromosomes (XX).

Answer 2

Explanation:

male has one X chromosome and one Y chromosome (XY). ... Thus, the male (father) is responsible for the sex of the baby. Hence, it is a chance event that every time the woman conceived, only the sperm containing the X chromosome fertilised the egg. As a result, only daughters were born.