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Oct. 10, 2018

Oct. 10, 2018. You need: Clean paper / pencil Mitosis notes (classwork and puzzle) Warm Up: What are the phases of mitosis? I CAN: demonstrate the phases (and functions of each phase) of mitosis. MITOSIS. Starting point:

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Oct. 10, 2018

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  1. Oct. 10, 2018 You need: Clean paper / pencil Mitosis notes (classwork and puzzle) Warm Up: What are the phases of mitosis? I CAN: demonstrate the phases (and functions of each phase) of mitosis.

  2. MITOSIS

  3. Starting point: You want to start with one cell that has 100% of the genetic information (like a normal body cell). To keep things simple, we will work with a cell that has 4 chromosomes in a normal body cell.

  4. Your goal: To create TWO cells that each have 100% of the genetic information. These would have FOUR chromosomes each…and look just like the original.

  5. START Anaphase Interphase Prophase centromere Telophase Sister chromatids Metaphase Daughter Cells Cytokinesis

  6. Did you reach the goal? Two cells and each has exactly 100% of the genetic material? Is the genetic material the same in these cells? Is that good or bad? Why?

  7. Mitosis – from the Amoeba sisters • Watch this YouTube video from a group that call themselves the Amoeba sisters!

  8. Inside the nucleus, are CHROMOSOMES. CHROMOSOMES small packages of DNA DNA comes from both your mom and your dad.

  9. Chromosomes contain the genetic material of an organism. This genetic material is organized into packets of information called genes. Genes give the instructions for an organism’s traits or physical features. Chromosome = a package of genetic information that can be passed from parent to offspring. GENE: info from Mom about eye color AND from Dad about a trait (like eye color).

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

  11. Why do animals shed their skin?

  12. The process of asexual reproduction begins after a sperm fertilizes an egg.

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

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

  15. Animal Mitosis -- Review

  16. Plant Mitosis -- Review

  17. On your notes (this page), DRAW in the chromosomes using colored pencils. • Be consistent – use the same TWO colors so you can follow the movements and changes. • Describe what is happening in each picture. The slides will help you explain.

  18. Interphase • Description of events: • Centriole pair replicates. • DNA replicates to create duplicated chromosomes. • Most of the cell’s life is spent in INTERPHASE Notice: This drawing uses blue and red, but you may use ANY two colors – just keep the same colors for the rest of the phase, too.

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

  20. Prophase • Description of events: • Centriole pair begins to migrate to opposite poles. • Nuclear membrane begins to dissolve. • Spindle fibers begin to form between centriole pairs. • Duplicated chromosomes begin to condense. • Nucleolus begins to disappear.

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

  22. Metaphase • Description of events: • Centriole pairs are fully migrated to opposite poles. • The spindle apparatus is fully formed. • Spindle fibers have moved the duplicated chromosomes so that they line up at the midline of the cell. • Nuclear membrane has completely disappeared. • Duplicated chromosomes are at their most condensed at this stage.

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

  24. Anaphase • Description of events: • Spindle fibers pull the sister chromatids apart at the centromere and drag them to opposite poles. • The cell elongates (gets longer – like an oval)

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

  26. Description of events: • The cell begins cytokinesis by forming a cleavage furrow (pinch) to divide the cytoplasm. • Nuclear membranes begin to reform around the separate (but identical) sets of chromosomes. • Spindle apparatus has disassembled and the spindle fibers dissolve. • Chromosomes begin to de-condense. • Nucleolus begins to re-form. Telophase

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

  28. Description of events: • The two identical daughter cells are completely separated. • Spindle fibers have completely disappeared. • The chromosomes are completely de-condensed and lengthened. • The nucleolus is very distinct. • The nuclear membrane has completely re-formed around the chromosomes. After cytokinesis

  29. Check over your work!!

  30. Interphase • Description of events: • Centriole pair replicates. • DNA replicates to create duplicated chromosomes. • Most of the cell’s life is spent in INTERPHASE • Description of events: • Spindle fibers pull the sister chromatids apart at the centromere and drag them to opposite poles. • The cell elongates (gets longer – like an oval) Anaphase Prophase Telophase • Description of events: • The cell begins cytokinesis by forming a cleavage furrow (pinch) to divide the cytoplasm. • Nuclear membranes begin to reform around the separate (but identical) sets of chromosomes. • Spindle apparatus has disassembled and the spindle fibers dissolve. • Chromosomes begin to de-condense. • Nucleolus begins to re-form. • Description of events: • Centriole pair begins to migrate to opposite poles. • Nuclear membrane begins to dissolve. • Spindle fibers begin to form between centriole pairs. • Duplicated chromosomes begin to condense. • Nucleolus begins to disappear. • Description of events: • Centriole pairs are fully migrated to opposite poles. • The spindle apparatus is fully formed. • Spindle fibers have moved the duplicated chromosomes so that they line up at the midline of the cell. • Nuclear membrane has completely disappeared. • Duplicated chromosomes are at their most condensed at this stage. Metaphase • Description of events: • The two identical daughter cells are completely separated. • Spindle fibers have completely disappeared. • The chromosomes are completely de-condensed and lengthened. • The nucleolus is very distinct. • The nuclear membrane has completely re-formed around the chromosomes. After cytokinesis

  31. Mitosis Hand Jive! • Here are two videos that explain the hand motions used to represent phases of mitosis. Watch them both!!! Bill Ry the science guy EXPLAINS the hand signals. Ms. Loree dances through the mitosis hand signals.

  32. Mnemonic Device • Sometimes it helps us to remember things if we put it into a song, or hand signals, or a crazy sentence. • You may have used “Please Excuse My Dear Aunt Sally.” The first letter of each word matches the steps in the order of operations (parentheses, exponents, multiply/divide, add/subtract). • Come up with a Mnemonic Device using the letters of the phases of mitosis (IPMATC). Turn it in through Google Classroom

  33. IPMATC REMEMBER! • Interphase • Prophase • Metaphase • Anaphase • Telophase • Cytokinesis Iguanas Pee More Accurately Than Cats.

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