Biology 5090 · O Level · DNA

DNA — practice question

A student made some comments about chromosomes, but several are inaccurate. 1. A human body cell contains $46$ pairs of chromosomes. 2. In gametes, chromosomes occur in pairs. 3. Males have one X chromosome and one Y chromosome in every body cell. 4. Chromosomes consist of a long DNA molecule that is split into regions called genes. 5. Chromosomes contain genes that are divided into regions called DNA molecules. Which two statements are correct?

  • A1 and 2
  • B1 and 3
  • C2 and 5
  • D3 and 4

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