Mitosis
Mitosis <ul><li>Mitosis is a process of  cell division </li></ul><ul><li>Goal = production of 2 daughter cells.  </li></ul...
<ul><li>Cells divide for growth or repair.  </li></ul><ul><li>Before each division, the cell makes an identical copy of ea...
Stages <ul><li>Interphase </li></ul><ul><li>Prophase </li></ul><ul><li>Promatophase </li></ul><ul><li>Metaphase </li></ul>...
 
Interphase <ul><li>Preparing with mitosis </li></ul><ul><li>The cell is engaged in metabolic activity </li></ul><ul><li>Nu...
Prophase <ul><li>Chromatin in the nucleus begins to condense and becomes visible  </li></ul><ul><li>Each chromosome  has d...
Prometaphase <ul><li>Proteins attach to the centromeres creating the kinetochores. </li></ul><ul><li>Microtubules attach a...
Metaphase <ul><li>Spindle fibers align the chromosomes along the middle of the cell nucleus (metaphase plate/equitorial). ...
Anaphase <ul><li>The paired chromosomes separate at the kinetochores and move to opposite sides of the cell. </li></ul><ul...
Telophase <ul><li>Chromatids (daughter chromosomes) arrive at opposite poles of cell </li></ul><ul><li>New membranes form ...
Cytokinesis <ul><li>Results when a fiber ring composed of a protein called actin around the center of the cell contracts p...
Mitosis in general
Summary
Mitosis vs Meiosis
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Mitosis

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Mitosis

  1. 1. Mitosis
  2. 2. Mitosis <ul><li>Mitosis is a process of cell division </li></ul><ul><li>Goal = production of 2 daughter cells. </li></ul><ul><li>The daughter cells are identical to one another and to the original parent cell. </li></ul>
  3. 3. <ul><li>Cells divide for growth or repair. </li></ul><ul><li>Before each division, the cell makes an identical copy of each chromosome </li></ul><ul><li>During mitosis, each of the two new cells receives a complete set of 46 chromosomes. </li></ul><ul><li>Identical meaning it has the same info. </li></ul>
  4. 4. Stages <ul><li>Interphase </li></ul><ul><li>Prophase </li></ul><ul><li>Promatophase </li></ul><ul><li>Metaphase </li></ul><ul><li>Anaphase </li></ul><ul><li>Telophase </li></ul>
  5. 6. Interphase <ul><li>Preparing with mitosis </li></ul><ul><li>The cell is engaged in metabolic activity </li></ul><ul><li>Nucleolus may be visible. </li></ul><ul><li>The cell may contain a pair of centrioles </li></ul>
  6. 7. Prophase <ul><li>Chromatin in the nucleus begins to condense and becomes visible </li></ul><ul><li>Each chromosome has duplicated </li></ul><ul><li>Consists of two sister chromatids. </li></ul><ul><li>The nucleolus/nuclear envelope disappears. </li></ul><ul><li>Centrioles begin moving to opposite ends of the cell and fibers extend from the centromeres. </li></ul><ul><li>Some fibers cross the cell to form the mitotic spindle. </li></ul>
  7. 8. Prometaphase <ul><li>Proteins attach to the centromeres creating the kinetochores. </li></ul><ul><li>Microtubules attach at the kinetochores </li></ul><ul><li>Chromosomes begin moving. </li></ul>
  8. 9. Metaphase <ul><li>Spindle fibers align the chromosomes along the middle of the cell nucleus (metaphase plate/equitorial). </li></ul><ul><li>This organization helps to ensure that in the next phase, when the chromosomes are separated, each new nucleus will receive one copy of each chromosome. </li></ul><ul><li>Held in place by microtubules attached to the mitotic spindle.   </li></ul>
  9. 10. Anaphase <ul><li>The paired chromosomes separate at the kinetochores and move to opposite sides of the cell. </li></ul><ul><li>The centromeres divide. </li></ul><ul><li>Sister chromatids separate and move toward the corresponding poles.   </li></ul>
  10. 11. Telophase <ul><li>Chromatids (daughter chromosomes) arrive at opposite poles of cell </li></ul><ul><li>New membranes form around the daughter nuclei. </li></ul><ul><li>The chromosomes disperse </li></ul><ul><li>No longer visible under the light microscope. </li></ul><ul><li>Microtubules disappear. </li></ul><ul><li>The condensed chromatin expands </li></ul><ul><li>Nuclear envelope reappears. </li></ul>
  11. 12. Cytokinesis <ul><li>Results when a fiber ring composed of a protein called actin around the center of the cell contracts pinching the cell into two daughter cells, each with one nucleus. </li></ul>
  12. 13. Mitosis in general
  13. 14. Summary
  14. 15. Mitosis vs Meiosis

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