Cells can divide by mitosis, so each child cell retains a full set of chromosomes, or by meiosis, which halves the chromosomes and produces sperm and eggs. Making a baby with the correct number of chromosomes is therefore crucially dependent on meiosis. This interactive feature from NOVA: 18 Ways to Make a Baby provides a step-by-step, side-by-side comparison of meiosis and mitosis.
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