Mitosis ppt

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  • A mnemonic to help remember the stages of mitosis.
  • Mitosis ppt

    1. 1. <ul><li>How do little elephants grow up to be BIG elephants? </li></ul>
    2. 2. Why do animals shed their skin?
    3. 3. The process of asexual reproduction begins after a sperm fertilizes an egg.
    4. 4. Three reasons why cells reproduce by asexual reproduction: 1. Growth 2. Repair 3. Replacement Skin cancer - the abnormal growth of skin cells - most often develops on skin exposed to the sun. Cell that reproduce by asexual reproduction reproduce constantly. Can you name two types of tissue in the human body that are not constantly dividing through mitosis?
    5. 5. Animated Mitosis Cycle http://www.cellsalive.com/mitosis.htm <ul><li>Interphase </li></ul><ul><li>Prophase </li></ul><ul><li>Metaphase </li></ul><ul><li>Anaphase </li></ul><ul><li>Telophase & Cytokinesis </li></ul>
    6. 6. Interphase occurs before mitosis begins <ul><li>Chromosomes are copied (# doubles) </li></ul><ul><li>Chromosomes appear as threadlike coils ( chromatin ) at the start, but each chromosome and its copy( sister chromosome) change to sister chromatids at end of this phase </li></ul>CELL MEMBRANE Nucleus Cytoplasm
    7. 7. Interphase Animal Cell Plant Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
    8. 8. Prophase 1 st step in Mitosis <ul><li>Mitosis begins (cell begins to divide) </li></ul><ul><li>Centrioles (or poles) appear and begin to move to opposite end of the cell. </li></ul><ul><li>Spindle fibers form between the poles. </li></ul>Centrioles Sister chromatids Spindle fibers
    9. 9. Prophase Animal Cell Plant Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm Spindle fibers Centrioles
    10. 10. Metaphase 2 nd step in Mitosis <ul><li>Chromatids (or pairs of chromosomes) attach to the spindle fibers. </li></ul>Centrioles Spindle fibers
    11. 11. Metaphase Animal Cell Plant Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
    12. 12. Anaphase 3 rd step in Mitosis <ul><li>Chromatids (or pairs of chromosomes) separate and begin to move to opposite ends of the cell. </li></ul>Centrioles Spindle fibers
    13. 13. Anaphase Animal Cell Plant Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
    14. 14. Telophase 4th s tep in Mitosis <ul><li>Two new nuclei form. </li></ul><ul><li>Chromosomes appear as chromatin (threads rather than rods). </li></ul><ul><li>Mitosis ends. </li></ul>Nuclei Nuclei Chromatin
    15. 15. Telophase Animal Cell Plant Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
    16. 16. Cytokinesis occurs after mitosis <ul><li>Cell membrane moves inward to create two daughter cells – each with its own nucleus with identical chromosomes. </li></ul>
    17. 17. Animal Mitosis -- Review Interphase                                                               Prophase                                                               Metaphase                                                               Anaphase                                                               Telophase                                                               Interphase                                                              
    18. 18. Plant Mitosis -- Review Interphase                                                               Prophase                                                               Metaphase                                                               Anaphase                                                               Telophase                                                               Interphase                                                              
    19. 19. REMEMBER! <ul><li>I nterphase </li></ul><ul><li>P rophase </li></ul><ul><li>M etaphase </li></ul><ul><li>A naphase </li></ul><ul><li>T elophase </li></ul><ul><li>C ytokinesis </li></ul>I P ray M ore A t T he C hurch IPMATC
    20. 20. Cell Cycle
    21. 21. The Cell Cycle - Cell Division
    22. 24. Mitosis Animation http://www.cellsalive.com/mitosis.htm

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