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How do little elephants grow up to be BIG elephants?

Learn about the process of mitosis, the cycle of cell reproduction and growth, and the reasons why cells reproduce through asexual reproduction. Explore the stages of mitosis - Interphase, Prophase, Metaphase, Anaphase, Telophase, and Cytokinesis - through animated visuals and photographs.

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How do little elephants grow up to be BIG elephants?

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  1. How do little elephants grow up to be BIG elephants?

  2. Why do animals shed their skin?

  3. The process of asexual reproduction begins after a sperm fertilizes an egg.

  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.

  5. Animated Mitosis Cycle http://www.cellsalive.com/mitosis.htm • Interphase • Prophase • Metaphase • Anaphase • Telophase • Cytokinesis

  6. Interphaseoccurs before mitosis begins • Chromosomes are copied(# doubles) • 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 CELL MEMBRANE Nucleus Cytoplasm

  7. Plant Cell Animal Cell Interphase Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

  8. Prophase 1st step in Mitosis • Mitosis begins (cell begins to divide) • Centrioles (or poles) appear and begin to move to opposite end of the cell. • Spindle fibers form between the poles. Centrioles Sister chromatids Spindle fibers

  9. Plant Cell Animal Cell Spindle fibers Centrioles Prophase Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

  10. Metaphase 2nd step in Mitosis • Centrioles: Move to each pole of the cell • Chromatids (or pairs of chromosomes) attach to the spindle fibers. Centrioles Spindle fibers

  11. Plant Cell Animal Cell Metaphase Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

  12. Anaphase 3rdstep in Mitosis • Chromatids(or pairs of chromosomes) separate and begin to move to opposite ends of the cell. • The spindle fibers pull them in toward the centrioles. Centrioles Spindle fibers

  13. Plant Cell Animal Cell Anaphase Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

  14. Telophase4th step in Mitosis • Two new nuclei form. • Chromosomes appear as chromatin(threads rather than rods). • Mitosis ends. Nuclei Nuclei Chromatin

  15. Plant Cell Animal Cell Telophase Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

  16. Cytokinesisoccurs after mitosis • Cell membrane moves inward to create two daughter cells – each with its own nucleus with identical chromosomes.

  17. Animal Mitosis -- Review

  18. Plant Mitosis -- Review

  19. IPMATC • Interphase • Prophase • Metaphase • Anaphase • Telophase • Cytokinesis REMEMBER! IPeedMyselfAndThenCried

  20. Cell Cycle

  21. http://www.cellsalive.com/mitosis.htm MitosisAnimation

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