Question

In human males all the chromosomes are paired perfectly except one. This/these unpaired chromosome is/are

1. large chromosome
2. small chromosome
3. Y-chromosome
4. X-chromosome

Options

• (i) and (ii)

• (iii) only

• (iii) and (iv)

• (ii) and (iv)

Answer 1

(iii) and (iv)

Explanation - 

Human males have 22 pairs of autosomes and one mismatched pair of sex chromosomes- one normal-sized X chromosome and the other short Y chromosomes.