Mitosis.ppt

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Mitosis.ppt

  1. 1. MITOSIS cell division
  2. 2. <ul><li>-genetic material (blueprints) </li></ul><ul><li>Long strands: </li></ul><ul><li>Chromatin </li></ul><ul><li>(spaghetti) </li></ul>DNA DNA
  3. 3. <ul><li>CHROMOSOMES: Condensed strands,macaroni </li></ul><ul><li>CHROMATIDS: Duplicated Chromosomes, double macaroni </li></ul>DNA DNA
  4. 4. MITOSIS <ul><li>Division of the cell to make new cells. </li></ul><ul><li>Three stages of cell division: </li></ul><ul><ul><li>Interphase - whole cell </li></ul></ul><ul><ul><li>Mitosis - nucleus only (4 steps) </li></ul></ul><ul><ul><li>Cytokinesis -whole cell </li></ul></ul>
  5. 5. INTERPHASE <ul><li>Whole cell-organelles 2x, </li></ul><ul><li>DNA replicates, prep. </li></ul>
  6. 6. <ul><li>Most of the cell’s life is spent in interphase. </li></ul>INTERPHASE
  7. 7. MITOSIS <ul><li>4 PHASES/STEPS </li></ul><ul><li>NUCLEUS ONLY </li></ul>
  8. 8. PROPHASE <ul><li>Nuclear membrane disappears. </li></ul><ul><li>Centrioles move to opposite sides of cell. </li></ul><ul><li>Chromosomes 2x. </li></ul>
  9. 9. PROPHASE
  10. 10. PROPHASE
  11. 11. METAPHASE <ul><li>Chromatids </li></ul><ul><li>attach to </li></ul><ul><li>spindle fibers </li></ul><ul><li>and line up in </li></ul><ul><li>center of cell. </li></ul>
  12. 12. METAPHASE <ul><li>M ILITARY LINE-UP </li></ul>
  13. 13. METAPHASE
  14. 14. ANAPHASE <ul><li>Chromatids </li></ul><ul><li>go to </li></ul><ul><li>opposite </li></ul><ul><li>sides of </li></ul><ul><li>the cell. </li></ul>
  15. 15. ANAPHASE <ul><li>A WAY </li></ul>
  16. 16. ANAPHASE
  17. 17. TELOPHASE <ul><li>New nuclear </li></ul><ul><li>membrane </li></ul><ul><li>surrounds </li></ul><ul><li>Chromosomes, </li></ul><ul><li>which return </li></ul><ul><li>to chromatin. </li></ul>
  18. 18. TELOPHASE <ul><li>T WO NUCLEI </li></ul>
  19. 19. TELOPHASE <ul><li>SAME TIME AS CYTOKINESIS </li></ul>
  20. 20. CYTOKINESIS <ul><li>Whole cell </li></ul><ul><li>Same time as Telophase </li></ul><ul><li>Chromatin again </li></ul>
  21. 21. CYTOKINESIS <ul><li>Difference between </li></ul><ul><li>P & A: Animal pinches in </li></ul><ul><li>&….. </li></ul>
  22. 22. CYTOKINESIS <ul><li>Difference between </li></ul><ul><li>P & A: </li></ul><ul><li>Plant has cell plate moving out. </li></ul>
  23. 23. CYTOKINESIS <ul><li>2 C ELLS </li></ul>
  24. 24. Always Changing
  25. 27. WHOLE PROCESS: <ul><li>CREATION OF 2 NEW IDENTICAL CELLS </li></ul>

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