Question

In human beings, the sex chromosomes are denoted as ______

• A. X and Y
• B. X and O
• C. Z and W
• D. Z and O

Answer 1

The correct option is A

X and Y

Human beings have distinct chromosomes responsible for different sexes and are called sex chromosomes. They are denoted by the letters X and Y.
Males have non-identical sex chrosmomes, X and Y and females have identical sex chromosomes, X and X.