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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:



  • 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]



  • uplining of the chromosomes along the midline of the cell[2]


  • separation of each chromatid pair into two identical chromosomes that are pulled to opposite ends of the cell by the spindle fibres[2]


  • beginning of the decondensation of the chromosomes
  • breakdown of the spindle
  • reformation of the nuclear membranes and nucleoli[2]


See also


  1. Wile, Dr. Jay L. Exploring Creation With Biology. Apologia Educational Ministries, Inc. 1998
  2. 2.0 2.1 2.2 2.3