Difference between revisions of "Mitosis"
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The term '''mitosis''' refers to the duplication of a [[cell]]'s [[chromosome]]s to allow daughter cells to receive the exact [[genetics|genetic]] makeup of the parent cell.<ref>Wile, Dr. Jay L. ''Exploring Creation With Biology''. Apologia Educational Ministries, Inc. 1998</ref> Mitosis does not occur in [[prokaryotes]], which divide in a simpler way using their mesosomes. Errors made in the process of the copying of the cell's DNA during the prophase occasionally occur, resulting in [[mutations]]. Mitosis makes up the "M-phase" of the [[cell cycle]], and is comprised of the following stages: | The term '''mitosis''' refers to the duplication of a [[cell]]'s [[chromosome]]s to allow daughter cells to receive the exact [[genetics|genetic]] makeup of the parent cell.<ref>Wile, Dr. Jay L. ''Exploring Creation With Biology''. Apologia Educational Ministries, Inc. 1998</ref> Mitosis does not occur in [[prokaryotes]], which divide in a simpler way using their mesosomes. Errors made in the process of the copying of the cell's DNA during the prophase occasionally occur, resulting in [[mutations]]. Mitosis makes up the "M-phase" of the [[cell cycle]], and is comprised of the following stages: | ||
[[Image:Mitosis.gif|thumb|150px|left|Mitosis]] | [[Image:Mitosis.gif|thumb|150px|left|Mitosis]] | ||
| + | |||
==Prophase== | ==Prophase== | ||
| + | * thickening and coiling of the chromosomes | ||
| + | * disappearance of the [[nucleolus]] | ||
| + | * beginning of the organization of a group of fibres to form a spindle and disintegration of the nuclear membrane<ref name="britannica">https://www.britannica.com/science/mitosis</Ref> | ||
==Prometaphase== | ==Prometaphase== | ||
==Metaphase== | ==Metaphase== | ||
| + | * uplining of the chromosomes along the midline of the cell<ref name="britannica" /> | ||
==Anaphase== | ==Anaphase== | ||
| + | * separation of each chromatid pair into two identical chromosomes that are pulled to opposite ends of the cell by the spindle fibres<ref name="britannica" /> | ||
==Telophase== | ==Telophase== | ||
| + | * beginning of the decondensation of the chromosomes | ||
| + | * breakdown of the spindle | ||
| + | * reformation of the nuclear membranes and nucleoli<ref name="britannica" /> | ||
==Cytokinesis== | ==Cytokinesis== | ||
Revision as of 19:44, March 25, 2017
The term mitosis refers to the duplication of a cell's chromosomes to allow daughter cells to receive the exact genetic makeup of the parent cell.[1] Mitosis does not occur in prokaryotes, which divide in a simpler way using their mesosomes. Errors made in the process of the copying of the cell's DNA during the prophase occasionally occur, resulting in mutations. Mitosis makes up the "M-phase" of the cell cycle, and is comprised of the following stages:
Prophase
- thickening and coiling of the chromosomes
- disappearance of the nucleolus
- beginning of the organization of a group of fibres to form a spindle and disintegration of the nuclear membrane[2]
Prometaphase
Metaphase
- uplining of the chromosomes along the midline of the cell[2]
Anaphase
- separation of each chromatid pair into two identical chromosomes that are pulled to opposite ends of the cell by the spindle fibres[2]
Telophase
- beginning of the decondensation of the chromosomes
- breakdown of the spindle
- reformation of the nuclear membranes and nucleoli[2]
Cytokinesis
See also