Mitosis ppt

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Mitosis

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

    1. 1. How do little elephants grow up to be BIG elephants?
    2. 2. • Multicellularity • We all start out as a single cell • Key Concept: Growth occurs when more cells are made, NOT because cells get bigger.
    3. 3. Skin cancer - the abnormal growth of skin cells - most often develops on skin exposed to the sun.
    4. 4. Mitosis Notes http://www.cellsalive.com/mitosis.htm • Interphase • Prophase • Metaphase • Anaphase • Telophase & Cytokinesishttp://highered.mcgraw-hill.com/olcweb/cgi/pluginpop.cgi? it=swf::535::535::/sites/dl/free/0072437316/120073/bio14.swf::Mitosis%20and The cell life cycle consists of:
    5. 5. G2: Cell double- checks to make sure DNA is replicated and cell has enough organelles for the upcoming split G1: Cell grows in size. S: Cell makes identical copy of its DNA M: mitosis (Cell divides)
    6. 6.  What are the three phases of Interphase?  What happens during G1 phase?  What happens during S phase?  What happens during G2 phase?
    7. 7. Animated Mitosis Cycle http://www.cellsalive.com/mitosis.htm • Interphase • Prophase • Metaphase • Anaphase • Telophase & Cytokinesis http://highered.mcgraw-hill.com/olcweb/cgi/pluginpop.cgi?
    8. 8.  What is binary fission?  Why does the DNA need to move to either side of the cell before the cell divides?
    9. 9. • Chromosomes are copied (# doubles) • Chromosomes (DNA) appear as threadlike spaghetti called chromatin
    10. 10. Animal Cell Plant Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
    11. 11. • Nucleus starts to disappear. • Chromatin coils to become chromosomes. • Centrioles (or poles) appear and begin to move to opposite end of the cell. • Spindle fibers form between the poles. centriole
    12. 12. Animal Cell Plant Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm Spindle fibers Centrioles
    13. 13. • Chromatids are dragged to middle of cell along the metaphase plate. Centriole
    14. 14. Animal Cell Plant Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
    15. 15. • Chromatids (or pairs of homologous chromosomes) separate and begin to move to opposite ends of the cell. Sister chromatids
    16. 16. Animal Cell Plant Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
    17. 17.  What are the steps of mitosis?  What is the spaghetti –like DNA called?  What is the coiled, bundled DNA called?
    18. 18. • Two new nuclei form. • Chromosomes unwind into chromatin (threads instead of bundles). • Mitosis ends.
    19. 19. Animal Cell Plant Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
    20. 20. • Cell membrane moves inward to create two daughter cells – each with its own nucleus.
    21. 21. Cytokinesis is different in plants!
    22. 22. Animal Mitosis -- Review Interphase Prophase Metaphase Anaphase Telophase Interphase
    23. 23. Plant Mitosis -- Review Interphase Prophase Metaphase Anaphase Telophase Interphase
    24. 24. 28
    25. 25. 29 Quiz time! Can you fill in the blanks? 29
    26. 26. http://www.cellsalive.com/mitosis.htm

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