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Overview of mitosis: During the course of the cell cycle interphase and mitosis alternate. During interphase the chromosomes replicate and the cell prepares for mitosis, which is the process of cell division in which one cell becomes two genetically identical daughter cells. During interphase the chromosomes exist as thin, unpacked threads invisible under a light microscope.
The daughter cells produced by mitosis are identical, whereas the daughter cells produced by meiosis are different because crossing over has occurred. The events that occur in meiosis but not mitosis include homologous chromosomes pairing up, crossing over, and lining up along the metaphase plate in tetrads.