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Mitosis presentation final

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learn more about mitosis and the processes that are taking place.

learn more about mitosis and the processes that are taking place.

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  • 1. Contributors 1. Phakathi 2. Choong, 3. guest0a84f2f.
  • 2. Have your body in the pass six months? Tall/Weight
  • 3. Are you taller?
  • 4. Did your grow?
  • 5. Clip your toenails?
  • 6. Broken a bone recently?
  • 7. Wound – how does your body itself? repair
  • 8. Do you wonder why?
  • 9. Mitosis Definition: To create two identical daughter cells that are genetically identical to the parent cells
  • 10. Mitosis conserves chromosome number by allocating replicated chromosomes equally to each of the daughter nuclei.
  • 11. Chromosome
  • 12. Continues  Mitosis is a process of cell division Goal = production of 2 daughter cells. The daughter cells are identical to one another and to the original parent cell.
  • 13. Continues  Mitosis produced the somatic cells that now make up your body and is also the means by which your body continues to generate new cells to replace dead and damaged ones.
  • 14. Acronym for MITOSIS IPMAT Interphase Prophase Metaphase Anaphase Telophase
  • 15. Phases  Interphase  Prophase  Promatophase  Metaphase  Anaphase  Telophase
  • 16.  A nuclear envelope bounds the nucleus.  Chromosomes that were duplicated during S phase cannot be seen individually because they have not yet condensed.
  • 17. The cell cycle
  • 18. Continues  Two centrosomes have formed by replication of a single centrosome.
  • 19. Continues In animal cells, each centrosome features two centrioles.
  • 20. Two Centrosomes have formed by replication of a single centrosome. In animal cells, each centrosome features two centrioles
  • 21. Continues The nucleus contains one or more nucleoli.
  • 22. The chromatin fibers become more tightly coiled. The nucleoli disappear.
  • 23. Continues Each duplicated chromosome appears as two identical sister chromatids joined together at their centromeres and along their arms by cohesion's
  • 24. Continues The mitotic spindle begins to form. The spindle is composed of the microtubules and centrosomes that extend from them. Shorter microtubules that extend from the centrosomes are called asters.
  • 25. Continues The centrosomes move away from each other, pushed away by the lengthening microtubules between them.
  • 26. The nuclear envelope fragments. The microtubules extending from each centrosome can now invade the nuclear area.
  • 27. Continues The chromosomes have become even more condensed. Each of the two chromatids of each chromosome now has a protein structure located at the centromere called a kinetochore
  • 28. Continues Some of the microtubules attach to the kinetochores, becoming “kinetochore microtubules” that push and pull the chromosomes back and forth.
  • 29. Continues Non-kinetochore microtubules interact with those from the opposite pole of the spindle.
  • 30. Metaphase is the longest stage of mitosis, and lasts about 20 minutes. The centrosomes are now at opposite poles of the cell.
  • 31. Continues The chromosomes line up on the metaphase plate, an imaginary plane that is equal distance between the spindle’s two poles. The chromosome’s centromeres lie on the metaphase plate
  • 32. Continues The kinetochores of the sister chromatids are attached to kinetochore microtubules reaching from opposite poles
  • 33. Anaphase is the shortest stage of mitosis, and lasts only a few minutes. When the cohesion proteins are cleaved, anaphase begins. This allows the two sister chromatids of each pair to part.
  • 34. Continues The two daughter chromosomes begin moving toward opposite ends of the cell as the kinetochore microtubules begin to shorten. The chromosomes move centromere first because the microtubules are attached to the centromeres. They travel at about 1 micrometer per minute.
  • 35. Continues The cell elongates as the non-kinetochore microtubules lengthen. By the end of anaphase, the two ends of the cell have complete and equal collections of chromosomes.
  • 36. Continues
  • 37. Nucleoli reappear. The chromosomes become less condensed. Mitosis is complete.
  • 38. Continues Twodaughter nuclei form in the cell. Nuclear envelopes are formed from the fragments of the parent cell’s nuclear envelope and other portions of the endomembrane system.
  • 39. Thedivision of the cytoplasm is usually almost complete by late telophase, so the two daughter cells appear shortly after the end of mitosis.
  • 40. Continues Inanimal cells, cytokinesis involves the formation of a cleavage furrow, which pinches the cell in two
  • 41. Mitosis in general
  • 42. Somatic cells (all body cells except gamete cells)
  • 43. Reference list  Phakathi, N. 2013. Life science grade 10: mitosis cell division. http://www.slideshare.net/fundos/life- science-grade-10. Accessed 06 March 2014.  Choong, R. 2010. PowerPoint mitosis 1. http://www.slideshare.net/rchoong/powerpoint- mitosis-1. Accessed 06 March 2014.  guest0a84f2f. 2009. cell division by mitosis. http://www.slideshare.net/guest0a84f2f/cell- division-by-mitosis. Accessed 06 March 2014.

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