A student writes: "A human body cell has 23 chromosomes, because there are 23 pairs."
Which correction is right?
It has 23 chromosomes, because each pair counts as one only
It has 92 chromosomes, because each of the pairs holds four
It has 46 chromosomes, because each of the 23 pairs holds two
It has 46 pairs, because each chromosome is counted twice
63 exam-style questions on AQA GCSE Biology 1.2 Cell division, covering 1.2.1 Chromosomes, 1.2.2 Mitosis and the cell cycle, and 1.2.3 Stem cells. Each one has a worked solution and a mark scheme showing where the marks go.