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This is an accepted version of this page This is the latest accepted revision, reviewed on 19 December 2024. Process in which chromosomes are replicated and separated into two new identical nuclei For the type of cell division in sexually reproducing organisms used to produce gametes, see Meiosis. For excessive constriction of the pupils, see Miosis. For the parasitic infestation, see Myiasis ...
Mitosis The resultant number of cells in mitosis is twice the number of original cells. The number of chromosomes in the offspring cells is the same as that of the parent cell. Meiosis The resultant number of cells is four times the number of original cells.
The eukaryotic cell cycle consists of four distinct phases: G 1 phase, S phase (synthesis), G 2 phase (collectively known as interphase) and M phase (mitosis and cytokinesis). M phase is itself composed of two tightly coupled processes: mitosis, in which the cell's nucleus divides, and cytokinesis, in which the cell's cytoplasm and cell membrane divides forming two daughter cells.
[5] [6] After growth from the zygote to the adult, cell division by mitosis allows for continual construction and repair of the organism. [7] The human body experiences about 10 quadrillion cell divisions in a lifetime. [8] The primary concern of cell division is the maintenance of the original cell's genome.
Stages of early mitosis in a vertebrate cell with micrographs of chromatids Metaphase (from Ancient Greek μετα- ( meta- ) beyond, above, transcending and from Ancient Greek φάσις (phásis) 'appearance') is a stage of mitosis in the eukaryotic cell cycle in which chromosomes are at their second-most condensed and coiled stage (they are ...
Here, we look at 10 things to know about vaccines. Vaccines Are Lifesaving. The World Health Organization reports that global vaccine efforts have saved an estimated 154 million people worldwide ...
In human somatic cells, the G 1 stage of the cell cycle lasts about 10 hours. [2] However, in Xenopus embryos, sea urchin embryos, and Drosophila embryos, the G 1 phase is barely existent and is defined as the gap, if one exists, between the end of mitosis and the S phase. [2]
Here are 10 facts you may not have known about Hanukkah. Hanukkah means "dedication" in Hebrew. A public menorah lighting in Mumbai, India. Rafiq Maqbool/AP.