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Mitosis

Mitosis. What is Mitosis?. Mitosis : Cell division involving somatic (non-sex) cells Involves only diploid cells Form of asexual reproduction for some life (bacteria & protista, fungi) End Result : Two genetically identical “daughter cells”. The Cell Cycle.

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Mitosis

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  1. Mitosis

  2. What is Mitosis? • Mitosis: Cell division involving somatic (non-sex) cells • Involves only diploid cells • Form of asexual reproduction for some life (bacteria & protista, fungi) • End Result: Two genetically identical “daughter cells”

  3. The Cell Cycle • Defined: Repeating set of events in the life of a cell • 1) Interphase • G1, S, G2 • 2) Prophase • 3) Metaphase • 4) Anaphase • 5) Telophase

  4. Interphase • Divided into 3 Stages: • G1 Stage • Normal function performed • Cell growth • Organelles created • S Stage • Chromatin (DNA strands) duplicated • G2 Stage • Cell growth • Normal function performed

  5. Prophase • 1st Mitosis Stage • Chromatin (DNA strands) coils into chromosomes • Nucleus dissolves spilling the chromosomes • Spindle fibers form

  6. Metaphase • 2nd stage of mitosis • Spindle fibers attach to centromeres of each chromosome • Spindle fibers pull the chromosomes to the cell’s equator

  7. Anaphase • 3rd stage of mitosis • Spindle fibers pull ½ the chromatids to each end of the cell

  8. Telophase • 4th stage of mitosis • Spindle fibers dissolve • Chromatids unwind into chromatin • Nucleus reforms • Cytokinesis occurs

  9. Cytokinesis • Defined: Dividing of the cytoplasm • In animals: Cell pinches inward • In plants: Cell plate begins to separate the two new cells

  10. Cell plate

  11. Animated Mitosis Clip Real Mitosis video clip

  12. Name that Stage! Metaphase

  13. Name that Stage! Telophase

  14. Name that Stage! Interphase

  15. Name that Stage! Prophase

  16. Name that Stage! Anaphase

  17. Prophase Metaphase Interphase Telophase Anaphase

  18. Quick Review • Mitosis = the division of somatic (non-sex) cells • Each stage has different characteristics • End Result = Two identical diploid cells

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