Mitosis is the process by which a eukaryotic cell separates the chromosomes in its cell nucleus into two identical sets in two nuclei.[1] It is generally followed immediately by cytokinesis, which divides the nuclei, cytoplasm, organelles and cell membrane into two cells containing roughly equal shares of these cellular components. Mitosis and cytokinesis together define the mitotic (M) phase of the cell cycle - the division of the mother cell into two daughter cells, genetically identical to each other and to their parent cell. This accounts for approximately 10% of the cell cycle.
Mitosis occurs exclusively in eukaryotic cells, but occurs in different ways in different species. For example, animals undergo an "open" mitosis, where the nuclear envelope breaks down before the chromosomes separate, while fungi such as Aspergillus nidulans and Saccharomyces cerevisiae (yeast) undergo a "closed" mitosis, where chromosomes divide within an intact cell nucleus.[2] Prokaryotic cells, which lack a nucleus, divide by a process called binary fission.
Meiotic cell division occurs in the reproductive organs, such as the ovaries in females and the testes in males.
The secondary oocyte completes its second meiotic division upon fertilization by a sperm cell. This leads to the formation of a mature ovum and a polar body.
Somatic cells undergo mitotic division but not meiotic division. Meiotic division is only seen in germ cells to produce gametes.
A meiotic division produces four daughter cells.
Human mitotic cells undergo cell division to produce two identical daughter cells with the same number of chromosomes as the parent cell. In contrast, human meiotic cells undergo two rounds of cell division to produce four haploid daughter cells with half the number of chromosomes as the parent cell. Meiotic cells are involved in the formation of gametes (sperm and egg cells) for sexual reproduction, while mitotic cells are involved in growth, repair, and asexual reproduction.
Meiotic cell division occurs in the reproductive organs, such as the ovaries in females and the testes in males.
Meiosis
Meiotic cell division in animals is directly responsible for the producing sex cells.
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meiotic cell division
Meiotic cell division takes place in the gonads in order to produce sex cells.
The secondary oocyte completes its second meiotic division upon fertilization by a sperm cell. This leads to the formation of a mature ovum and a polar body.
Mitotic cell division produces two genetically identical daughter cells that are genetically identical to their parent cell. The daughter cells that result from mitotic cell division are 2n, having two sets of chromosomes. Meiotic cell division produces four genetically non-identical cells that are 1n, having only one set of chromosomes. The parent cell for meiotic cell division is 2n.
Somatic cells undergo mitotic division but not meiotic division. Meiotic division is only seen in germ cells to produce gametes.
A meiotic division produces four daughter cells.
Mitotic or meiotic, depending on whether ordinary cell division or gamete production is involved.
Spermatogenesis is the form of cell division that creates sperm. It involves the process of sperm cell production through a series of mitotic and meiotic divisions in the testes.