Question

Sex is determined by different factors in various species. However, in human beings, it is determined genetically.

Which amongst the following option(s) is/are correct for human beings?

1. Gamete carrying X chromosome from female parent.
2. Gamete carrying X chromosome from male parent.
3. Gamete carrying Y chromosome from male parent.

Options

• (ii) and (iii)

• (i) only

• (i) and (iii)

• (iii) only

Answer 1

(ii) and (iii)

Explanation:

In humans, the male (XY) produces two types of gametes, one carrying an X chromosome and the other carrying a Y chromosome. The female (XX) produces only X-bearing gametes, so the male determines the sex of the child. Hence, (ii) and (iii) are correct.