Question

The maleness of a child is determined by

• A. The X chromosome in the zygote
• B. The Y chromosome in zygote
• C. The cytoplasm of germ cell which determines the sex
• D. Sex is determined by chance

Answer 1

The correct option is B The Y chromosome in zygote

A male has sex chromosomes X and Y, while a female has XX as sex chromosomes . During fertilization, the mother always contributes an X chromosome while the father either contributes an X or a Y chromosome. Hence, the maleness of the child is determined by the presence of Y chromosome in the zygote contributed by the sperm.

So, the correct answer is 'The Y chromosome in zygote'