Question

There are _____ pairs of chromosomes in human.

• A. 23
• B. 46
• C. 72
• D. 100

Answer 1

The correct option is A 23

In humans, each cell normally contains 23 pairs of chromosomes, for a total of 46. Twenty-two of these pairs, called autosomes, look the same in both males and females. The 23rd pair, the sex chromosomes, differ between males and females. Females have two copies of the X chromosome, while males have one X and one Y chromosome.

Therefore, the correct answer is option A.