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How do little elephants grow up to be BIG elephants?

How do little elephants grow up to be BIG elephants?. How are animals (including humans) able to shed skin cells?. The process of asexual reproduction begins after a sperm fertilizes an egg. This process is called mitosis. Mitosis.

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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. How are animals (including humans) able to shed skin cells?

  3. The process of asexual reproduction begins after a sperm fertilizes an egg. This process is called mitosis.

  4. Mitosis

  5. 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.

  6. Cell division occurs in a series of stages, or phases. These stages blend together and progress smoothly from one phase to the next.

  7. Mitosis Cycle • Interphase • Prophase • Metaphase • Anaphase • Telophase • Cytokinesis

  8. Chromatin • Uncoiled DNA

  9. 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

  10. Chromosomes • Rod shaped structure of tightly coiled DNA • Made up of two chromatids joined at the centromere

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

  12. 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

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

  14. Metaphase 2nd step in Mitosis Chromatids (or pairs of chromosomes) attach to the spindle fibers. Centrioles Spindle fibers

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

  16. Anaphase 3rdstep in Mitosis Chromatids (or pairs of chromosomes) separate and begin to move to opposite ends of the cell. Centrioles Spindle fibers

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

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

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

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

  21. Animal Mitosis -- Review

  22. Plant Mitosis -- Review

  23. Cell Cycle

  24. Cell Cycle Timing

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