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1 8 Mitosis


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1 8 Mitosis

  1. 1. Launch <ul><li>Get out the following four assignments for your homework packet </li></ul><ul><ul><li>-Review Sheet from Monday </li></ul></ul><ul><ul><li>-Enzyme Letter from Tuesday </li></ul></ul><ul><ul><li>-Enzyme Worksheet from Tuesday </li></ul></ul><ul><ul><li>-Cell cycle worksheet from Thursday </li></ul></ul><ul><ul><li>If time answer the following question: </li></ul></ul><ul><ul><li>What are the three main stages of the cell cycle and what happens in each? </li></ul></ul>
  2. 3. MITOSIS The process a cell uses to copy its DNA and create two identical daughter cells
  3. 4. Pre-Mitosis: INTERPHASE <ul><li>This is where the cell spends most of its time </li></ul><ul><li>Cell grows, gain nutrients, copies DNA </li></ul><ul><li>DNA is “just chillin” in the nucleus </li></ul>
  4. 5. Interphase = In-between
  5. 6. Step 1: PROPHASE <ul><li>DNA condenses into chromosomes </li></ul><ul><li>Chromosomes pair up with their exact copy </li></ul><ul><li>Nucleus breaks down </li></ul>
  6. 7. Prophase = Pairs
  7. 8. Step 2: METAPHASE <ul><li>Chromosomes line up in the middle of the cell </li></ul><ul><li>Chromosomes are attached to fibers that stretch from the poles to the middle of the cell </li></ul>
  8. 9. Metaphase = Middle
  9. 10. Step 3: ANAPHASE <ul><li>The stage when chromosomes separate </li></ul><ul><li>Each singular chromosome pulled to opposite sides of the cell by fibers in the cell </li></ul>
  10. 11. Anaphase = Apart
  11. 12. Step 4: TELOPHASE <ul><li>Cell membrane pinches off to form two cells </li></ul><ul><li>Nuclear envelope reforms around DNA </li></ul><ul><li>Chromosomes uncondense </li></ul>
  12. 13. Telophase = Two Cells
  13. 17. What stage is it?
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