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Stages of Mitosis

Stages of Mitosis. Mitosis (M Phase). The M Phase consists of: Mitosis and Cytokinesis Four Stages of Mitosis :. P rophase M etaphase A naphase T elophase. Late Interphase. Centrosome (with centriole pair). Nuclear membrane. Chromatin. Nucleolus. Late Interphase.

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Stages of Mitosis

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  1. Stages of Mitosis

  2. Mitosis (M Phase) The M Phase consists of: • Mitosis and Cytokinesis Four Stages of Mitosis: Prophase Metaphase Anaphase Telophase

  3. Late Interphase Centrosome (with centriole pair) Nuclear membrane Chromatin Nucleolus

  4. Late Interphase • Cell is preparing for division. • Chromatin (relaxed form of DNA) has been replicated. • Nuclear membrane and nucleolus are still visible.

  5. Early & Late Prophase Nuclear membrane (disappearing) Spindle apparatus Chromosomes made of two sister chromatids Centromere (where sister chromatids attach)

  6. Early & Late Prophase • Chromatin condenses into chromosomes. • Nuclear membrane & nucleolus disappear. • Spindle apparatus forms.

  7. Metaphase Centrosome Equator or metaphase plate Centromere

  8. Metaphase • Chromosomes line up at imaginary line in the middle of the cell. • Spindle apparatus is attached to the centromeres.

  9. Anaphase Centrosome Shortening spindle apparatus

  10. Anaphase • Spindle apparatus shortens and chromatids are pulled apart.

  11. Telophase& Cytokinesis Chromosomes relaxing Animal cell “cleavage furrow” OR Plant cell “cell plate” Nuclear membrane reforming

  12. Telophase & Cytokinesis • Chromosomes arrive at opposite ends of the cell and begin to relax. • Nuclear membranes reform and nucleoli reappear. • Spindle apparatus disassembles.

  13. Telophase & Cytokinesis • Begins towards the end of mitosis. • Microtubules help organelles and cytoplasm divide.

  14. What’s the end product? • Two identical daughter cells ready to start the cycle again… or not. • Some cells (like your nerve and muscle cells) do not undergo division. • For those that do (your skin and the lining of your intestinal tract) how would you know how quickly division takes place?

  15. RE-identify the stages of Mitosis

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