Question

The belief that the mother is completely responsible for the sex of the child is wrong because the child

पर्याय

• gets sex chromosome only from the mother

• develops in the body of the mother

• gets one sex chromosome from the mother and the other from the father

• gets sex chromosome only from the father

Answer 1

gets one sex chromosome from the mother and the other from the father

Explanation - 

The child gets one sex chromosome from the mother and one from the father. The mother has XX combination and always contributes an X-chromosome.
It is the sperm of father which determines the sex of the child. This is because half of the sperms have X-chromosomes and other half have Y-chromosomes.