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MITOTIC CELL DIVISION

MITOTIC CELL DIVISION. Cell Reproduction Without Sex. Cell Life Cycle. cell life cycle includes a period of growth and preparation for cell division (blue). This period is called Interphase. mitosis is the period of time that the cell spends reproducing. Plant Cell Mitosis.

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MITOTIC CELL DIVISION

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  1. MITOTIC CELL DIVISION Cell Reproduction Without Sex

  2. Cell Life Cycle • cell life cycle includes a period of growth and preparation for cell division (blue). This period is called Interphase. • mitosis is the period of time that the cell spends reproducing.

  3. Plant Cell Mitosis • the many stages of the cell life cycle can be seen in the image to the right • the process of cell reproduction includes prophase, metaphase, anaphase and telophase

  4. Interphase • longest phase of life cycle • G1 – phase of rapid growth and increase in protein and cell RNA • S – synthesis phase when DNA duplicates • G2 - phase of organelle development and growth in preparation for cell division

  5. Prophase • chromosomes appear • the nucleolus disappears • the cell membrane begins to break down

  6. Very Late Prophase • nuclear membrane has disappeared • chromosomes start to move to the equator of the cell • each chromosome has two identical chromatids

  7. Metaphase • chromosomes align along the equator of the cell • spindles that are attached to the poles connect to the centromeres

  8. Early Anaphase • chromosomes are pulled to the poll by the contraction of the spindle fibers • chromatids are separated at the centromere

  9. Late Anaphase • chromosomes begin to congregate at the poles • the energy for this process if provided by the mitochondria

  10. EarlyTelophase • the new cell wall begins to form to separate the new cell • the chromosomes begin to form a nucleus

  11. Late Telophase • the chromosomes start to uncoil and become less dense • two new identical cells are formed

  12. Mitosis Review • all four stages of mitosis can be seen in this picture. • note the process by which the red and blue chromosomes separate.

  13. Interactive Mitosis Tutorial This is an excellent interactive mitosis animation tutorial for high school biology students. http://www.sci.sdsu.edu/multimedia/mitosis/

  14. Credits • Bruce, Anne; http://www.microscopy-uk.org.uk/mag/artaug99/mitosis.html , Microscopy UK, August 1999.

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