Praxis II General Science

Category - Life Science

Chromosomes are used to store DNA for reproduction. How many pairs of chromosomes do humans have?
  1. 11
  2. 13
  3. 20
  4. 23
  5. 26
Explanation
Answer: D - Humans have 23 pairs of chromosomes. These consist of 22 autosomal chromosome pairs and 1 sex chromosome pair.
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