All human beings have ________ pairs of chromosomes in the nuclei of their cells.

Question

Question

This question was previously asked in

SSC MTS (2022) Official Paper (Held On: 19 Jun, 2023 Shift 1)

Answer 1

The correct answer is 23.

Key Points

Chromosomes:-
- Chromosomes are thread-like structures located inside the nucleus of animal and plant cells.
- Each chromosome is made of protein and a single molecule of deoxyribonucleic acid (DNA).
- DNA contains the genetic information that makes each living thing unique.
- Humans have 23 pairs of chromosomes, for a total of 46 chromosomes in each cell. (Hence option 4 is correct)
- The first 22 pairs are called autosomes, and they look the same in both males and females.
- The 23rd pair is the sex chromosomes, which determine a person's sex. Females have two X chromosomes, while males have one X and one Y chromosome.