1. The DNA is replicated, 2. The pairs of chromosomes line up along the centre of the cell, 3. The pairs are pulled apart, 4. Two new cells are formed, each with one copy of each chromosomes, some from each parent cell, 5. In each of the cells, the chromosomes line up along the centre again, 6. The arms of the chromosomes are pulled apart, 7. Four gametes are formed which contain half the number chromosomes,

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