Question
Download Solution PDFAll human beings have ________ pairs of chromosomes in the nuclei of their cells.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe 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.
Last updated on Jul 14, 2025
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