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Showing posts from August 22, 2018

Mitosis

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Not to be confused with Meiosis, Miosis, Myiasis, Myositis, or Myosotis. Mitosis in an animal cell (phases ordered counter-clockwise). Mitosis divides the chromosomes in a cell nucleus. Onion (Allium) cells in different phases of the cell cycle enlarged 800 diameters. a. non-dividing cells b. nuclei preparing for division (spireme-stage) c. dividing cells showing mitotic figures e. pair of daughter-cells shortly after division In cell biology, mitosis ( / m aɪ ˈ t oʊ s ɪ s / ) is a part of the cell cycle when replicated chromosomes are separated into two new nuclei. In general, mitosis (division of the nucleus) is preceded by the S stage of interphase (during which the DNA is replicated) and is often accompanied or followed by cytokinesis, which divides the cytoplasm, organelles and cell membrane into two new cells containing roughly equal shares of these cellular components. [1] Mitosis and cytokinesis together define the mitotic ( M ) phase of an animal cell cycle—the division