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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.
Then the cell goes through two consecutive rounds of nuclear divisions, termed meiosis I and meiosis II, according to the journal Nature. As a result, the overall process of meiosis produces four daughter cells from one single parent cell. Each daughter cell has half the number of chromosomes as the original parent cell. The mechanisms of mitosis and meiosis are very similar. Meiosis I. Prior to meiosis I, the duplicated chromosomes, also known as sister chromatids, fuse together.