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Q: How many pairs of autosomes does a normal human have?
  • A. 22
  • B. 44
  • C. 1
  • D. 23
Correct Answer: Option A - 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 last 23rd pair of chromosomes are chromosome X and chromosome Y, which determine sex in humans. Females have 44+XX chromosomes while males have 44+XY chromosomes.
A. 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 last 23rd pair of chromosomes are chromosome X and chromosome Y, which determine sex in humans. Females have 44+XX chromosomes while males have 44+XY chromosomes.

Explanations:

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 last 23rd pair of chromosomes are chromosome X and chromosome Y, which determine sex in humans. Females have 44+XX chromosomes while males have 44+XY chromosomes.