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Mitosis Tutorial


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Mitosis Tutorial

  1. 1. Mitosis Tutorial By Jon Brander ED 205 Section 2 Quit
  2. 2. Mitosis - What is Mitosis? - Stages of Mitosis - Interphase - Prophase - Prometaphase - Metaphase - Anaphase - Telophase - Cytokinesis - Why Mitosis? - Authors Page - Resources Quit
  3. 3. What is Mitosis <ul><li>Mitosis is the division of the nucleus and is often followed by cytokinesis, the division of the cytoplasm. This creates two genetically identical cells. </li></ul><ul><li>Mitosis occurs in a series of different stages. </li></ul><ul><li>Mitosis occurs exclusively in eukaryotes, but occurs in different ways in other species. </li></ul><ul><li>Mitosis and Cytokinesis are the shortest phases of the cell cycle. The longest phase being Interphase. </li></ul>Quit
  4. 4. Interphase <ul><li>Interphase is not technically part of mitosis, but is often included. </li></ul><ul><li>During interphase the cell grows and copies its chromosomes in preparation for cell division. </li></ul><ul><li>Chromosomes are not clearly discerned, although a dark spot called the nucleolus may be seen. </li></ul><ul><li>Also the cells may contain a pair of centrosomes, which are responsible for microtubule organization during mitosis. </li></ul>Quit
  5. 5. Prophase <ul><li>Chromatin Fibers become tightly coiled and chromosomes become evident. </li></ul><ul><li>The nucleolus disappears and the mitotic spindle begins to form. </li></ul><ul><li>The mitotic spindle is composed of the centrosomes (centrioles) and the mitotic spindles that extend from them. </li></ul><ul><li>Also the centrosomes begin to move away from one another </li></ul>Quit
  6. 6. Prometaphase <ul><li>The Nuclear envelope dissapears and the mitotic spindles begin to interact with the chromosomes. </li></ul><ul><li>Each of the two chromatids of the chromosome has a kinetochore attached to its centromere. </li></ul>Quit
  7. 7. Metaphase <ul><li>Metaphase is the longest stage of mitosis. </li></ul><ul><li>The centromeres are now at opposite ends of the cell. </li></ul><ul><li>The chromosomes meet in the middle of the cell along the metaphase plate. </li></ul><ul><li>Each sister chomatid is attached to a kinetochore from the opposite pole. </li></ul>Quit
  8. 8. Anaphase <ul><li>Anaphase is the shortest phase of Mitosis. </li></ul><ul><li>The two sister chromatids split to form chromosomes. </li></ul><ul><li>The two chromosomes move to opposite ends of the cell as the kinetochores shorten </li></ul><ul><li>The cell elongates </li></ul><ul><li>At the end of anaphase each side of the cell has equal amounts of chromosomes. </li></ul>Quit
  9. 9. Telophase <ul><li>Two daughter nuclei begin to form in the cell and nuclear envelopes begin to form. </li></ul><ul><li>Chromosomes become less condensed. </li></ul><ul><li>Mitosis: The division of one nucleus into two genetically identical nuclei, is now complete. </li></ul>Quit
  10. 10. Cytokinesis <ul><li>The division of the cytoplasm usually begins during late telophase, so two daughter cells appear shortly after mitosis. </li></ul><ul><li>In animals cytokinesis involves a cleavage furrow, which pinches the cell in two. </li></ul>Quit
  11. 11. Why Mitosis? <ul><li>Mitosis allows for the reproduction of multiple identical cells. </li></ul><ul><li>This allows for new skin cells to be produced when old ones fall off or wounds to be repaired. </li></ul><ul><li>Mitosis also plays a role in ones growth and development. </li></ul><ul><li>VIDEOS </li></ul><ul><li>- http:// =VlN7K1-9QB0 </li></ul><ul><li>- </li></ul><ul><li>Interactive Animation </li></ul><ul><li>- http:// </li></ul>Quit
  12. 12. The Author <ul><li>Hello, My name is Jon. I am a student at Grand Valley State University. I am studying for a secondary education degree with a major in biology and a minor in chemistry. I love to be outside and enjoy participating in many different sports, including wakeboarding. </li></ul><ul><li>EMAIL ME </li></ul>Quit
  13. 13. Resources <ul><li>-Biology 7 th Edition. 2005. Campbell and Reece </li></ul><ul><li>- Google Images </li></ul><ul><li> </li></ul><ul><li>Interactive Animation </li></ul><ul><li> </li></ul><ul><li>Videos </li></ul><ul><li>http:// =VlN7K1-9QB0 </li></ul><ul><li> http:// =s1ylUTbXyWU </li></ul>Quit