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Metaphase (from Ancient Greek μετα- 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 at their most condensed in anaphase). [1]
Mitosis is the process by which a eukaryotic cell separates. Date: 8 September 2008: Source: Made myself based on the information in wikipedia, and the images:, , , and the video: Author: LadyofHats: Permission (Reusing this file)
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English: A diagram of mitosis stages Interphase (G₂): In this substage, the cell prepares for nuclear division and a protein that makes microtubles for cell division is synthesized. Prophase: The longest stage of mitosis. In this stage the chromosomes become visible and the centrioles separate and move to opposite poles of the cell.
This image is a derivative work of the following images: File:MITOSIS_cells_secuence.svg licensed with PD-user . 2008-09-10T10:00:05Z LadyofHats 774x115 (470427 Bytes) {{Information |Description= a serie of cells showing the mitosis divition of eucaryotic cells |Source=own work, the cells are extracted from: Image:Prophase procariotic mitosis.svg Image:Prometaphase procariotic mitosis.svg
This is an accepted version of this page This is the latest accepted revision, reviewed on 8 February 2025. 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 ...
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] G 1 phase and the other subphases of the cell cycle may be affected by limiting growth factors such as nutrient supply, temperature, and room for growth.
The metaphase checkpoint is a fairly minor checkpoint, in that once a cell is in metaphase, it has committed to undergoing mitosis. However that's not to say it isn't important. In this checkpoint, the cell checks to ensure that the spindle has formed and that all of the chromosomes are aligned at the spindle equator before anaphase begins. [49]