Mitosis/Cellular Division
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Mitosis/Cellular Division



Brief explanation of Mitosis.

Brief explanation of Mitosis.



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Mitosis/Cellular Division Mitosis/Cellular Division Presentation Transcript

  • Mitosis. Created by E. Green 09/03/2014
  • Mitosis is also called Cell Division, why? During mitosis, the nucleus of the cell divides, forming two nuclei with identical genetic information.
  • Why is Mitosis important?  Allow an organism to grow.  Repairs damaged cells/tissue.  Replace dead cells/tissue.  Reproduction organisms. in some simple
  • Where does Mitosis take place?  In all somatic cells (include all body cells and excludes the sex cells – sperm/egg cells)
  • The process of Mitosis consists of a few phases: INTERPHASE PROPHASE METAPHASE ANAPHASE TELOPHASE
  • Interphase:  Cell builds up enough energy for division process.  DNA replication occurs  Cell look normal, like before division
  • Prophase:  Nuclear envelope and nucleolus disappear.  Chromatin become more tightly coiled, and condenses into individual chromosomes. Chromosomes arrange randomly in the cell.
  • continue  Centrioli move to opposite poles, with spindle fibers stretching between them.
  • Metaphase:  The centrioli reached the opposite poles with the spindle fibers in between.  The chromosomes arrange randomly on the equator, each single chromosome attaching to a separate spindle fiber by means of the centromere.
  • Anaphase:  The spindle fibers pull tight.  The centromeres attaching the chromatids of the chromosomes split in half.  Daughter chromosomes move to opposite poles.
  • Telophase:  Daughter chromosomes reach poles.  Nuclear envelope surrounds chromosomes.  Nucleolus reappear at each pole.  Chromosomes become less condense forming chromatin.  Two identical nuclei has been formed.
  • Continue…  Invagination of the cytoplasm and plasma membrane occurs. (Cleavage furrow forms in animal cells and a cytoplasmic plate forms in plant cells)  Continues until the cell in divided into 2 separate cells. (Identical to one another and to the original cell)
  • The Mitosis process:
  • Tips:  Definition of mitosis.  Know where it occurs.  Know importance of mitosis.  Name and discuss the different phases.  Draw and label each phase.
  • Something interesting!
  • Sources: Images:   ic.jpg  ic.jpg   5b90173b.jpg  e42db0ca55.jpg
  • Continue…      Williamson,J.,(2013). Class notes.