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Mitosis

Mitosis. Mitosis is the process in which the nucleus divides to form two new nuclei. What disease is mitosis gone wild?. 1. Ready?. Begin!. 4:00. Mitosis is the process in which the nucleus divides to form two new nuclei. What disease is mitosis gone wild?. 3:00.

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Mitosis

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  1. Mitosis Mitosis is the process in which the nucleus divides to form two new nuclei. What disease is mitosis gone wild? 1

  2. Ready? Begin!

  3. 4:00 Mitosis is the process in which the nucleus divides to form two new nuclei. What disease is mitosis gone wild?

  4. 3:00 Mitosis is the process in which the nucleus divides to form two new nuclei. What disease is mitosis gone wild?

  5. 2:00 Mitosis is the process in which the nucleus divides to form two new nuclei. What disease is mitosis gone wild?

  6. 1:00 Mitosis is the process in which the nucleus divides to form two new nuclei. What disease is mitosis gone wild?

  7. TIME’s UP!

  8. CANCER In cancer, cells divide and grow uncontrollably, forming malignant tumors, and invade nearby parts of the body. 8

  9. How do little elephants grow up to be BIG elephants?

  10. Why do animals shed their skin?

  11. Your life begins after a sperm fertilizes an egg, and you are smaller than a period in a newspaper.

  12. Three reasons why cells reproduce by asexual reproduction: 1. Growth 2. Repair 3. Replacement

  13. DNA inside the nucleus

  14. DNA Organization

  15. Chromosome Structure

  16. Karyotype

  17. Animal Mitosis -- preview

  18. Animated Mitosis Cycle http://www.cellsalive.com/mitosis.htm • Interphase • Prophase • Metaphase • Anaphase • Telophase • Cytokinesis

  19. Interphaseoccurs before mitosis begins • Chromosomes are copied (# doubles) • Chromosomes appear as threadlike coils (chromatin) at the start, but each chromosome and its copy(sister chromosome) change to sister chromatids at end of this phase CELL MEMBRANE Nucleus Cytoplasm

  20. Interphase Plant Cell Animal Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

  21. Prophase 1st step in Mitosis • Mitosis begins (cell begins to divide) • Centrioles(or poles) appear and begin to move to opposite end of the cell. • Spindle fibers form between the poles. Centrioles Sister chromatids Spindle fibers

  22. Prophase Plant Cell Animal Cell Spindle fibers Centrioles Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

  23. Metaphase 2nd step in Mitosis • Chromatids (or pairs of chromosomes) attach to the spindle fibers. Centrioles Spindle fibers

  24. Metaphase Plant Cell Animal Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

  25. Anaphase 3rdstep in Mitosis • Chromatids (or pairs of chromosomes) separate and begin to move to opposite ends of the cell. Centrioles Spindle fibers

  26. Anaphase Plant Cell Animal Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

  27. Telophase4th step in Mitosis • Two new nuclei form. • Chromosomes appear as chromatin (threads rather than rods). • Mitosis ends. Nuclei Nuclei Chromatin

  28. Telophase Plant Cell Animal Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

  29. Cytokinesisoccurs after mitosis • Cell membrane moves inward to create two daughter cells – each with its own nucleus with identical chromosomes.

  30. Plant Mitosis -- Review

  31. IPMATC REMEMBER! • Interphase • Prophase • Metaphase • Anaphase • Telophase • Cytokinesis IPayMoney AtThe Cashier

  32. The Cell Cycle

  33. Cell Cycle

  34. The Cell Cycle 34

  35. Smart Links Confused? Here are links to fun resources that further explain mitosis: • Mitosis Main Page on the Virtual Cell Biology Classroom ofScience Prof Online. • “Imitosis”music video by Andrew Bird. • DNA Replicationstep-through animation by John Kyrk. • Mitosis & Cytokinesisanimated video by McGraw-Hill. • Mitosis animation, step-through and quiz, Sadava, et al., Life: The Science of Biology, 9th Edition, Sinauer Associates. • Mitosisstep throughanimation from CellsAlive.com. • “That Spells DNA” song by Jonathan Coulton. (You must be in PPT slideshow view to click on links.) From the Virtual Cell Biology Classroom on ScienceProfOnline.com

  36. How would you calculate the % time in each phase?

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