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Meiosis is a special type of cell division that only occurs in reproductive organs. Meiosis produces reproductive cells called gametes (eggs or sperm) which can form a zygote with chromosomes from both parents.
Each cell contains one half the number of chromosomes as the original parent cell. Meiosis is similar to the cell division process of non-sex cells known as mitosis. Mitosis produces two cells that are genetically identical to and contain the same number of chromosomes as the parent cell. These cells are diploid cells because they contain two sets of chromosomes.