Question

Consider the following statements:
(i) The sex of a child is determined by what it inherits from the mother.
(ii) The sex of a child is determined by what it inherits from the father.
(iii) The probability of having a male child is more than that of a female child.
(iv) The sex of a child is determined at the time of fertilisation when male and female gametes fuse to form a zygote.
The correct statements are:

• A. (i) and (iii)
• B. (ii) and (iv)
• C. (iii) and (iv)
• D. (i), (iii) and (iv)

Answer 1

The Correct Option is B

The sex of a child is determined by the chromosomes inherited from the father (XY system). Fertilisation, where male (X or Y) and female (X) gametes fuse, decides the sex of the child. The mother’s genetic contribution does not determine the child’s sex.