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9.3 Cell Division

9.3 Cell Division.  The Cell Cycle. Section 10-2. G 1 phase. M phase. S phase. G 2 phase. At the end of G 2 Mitosis begins – Mitosis is divided into 4 Phases. 1. PROPHASE :. Nuclear membrane begins to disappear

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9.3 Cell Division

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  1. 9.3 Cell Division

  2.  The Cell Cycle Section 10-2 G1 phase M phase S phase G2 phase

  3. At the end of G2Mitosis begins – Mitosis is divided into 4 Phases 1. PROPHASE: • Nuclear membranebegins to disappear • DNA condenses and chromatidscome together to form Chromatid pairs(aka sister chromatids) held together by the Centromere • Centriolesappear, migrate to the cells pole and spindle fibers appear

  4. Spindle Fibers:framework of microtubules that guide the movement of chromosomes during mitosis and meiosis.

  5. PROPHASE

  6. 2. METAPHASE • All the chromosomes are in a plane (line) in the middle of the cell. • Spindles are fully formed and attached to the chromosomes at the centromeres

  7. 3. ANAPHASE • In anaphase, chromatid pairs separate as the spindle fibers pull them apart and toward each pole

  8. 4. TELOPHASE • Chromatid begin to unwind and relax • Nuclear membrane reforms • Telophasecontinues until the cells split The process of cells actually splitting is called cytokinesis.

  9. Modeling Mitosis With Playdoh Materials: Five paper plates 4 different playdoh colors Procedure: Assign a playdoh color to represent Mother’s chromosome_____________ Father’s chromosome______________ Centrioles_______________ Spindle Fibers_______________ 2. Label each plate to represent the four stages of mitosis (PMAT) and cytokinesis 3. Use the graphics in the mitosis powerpointor from chapter 9 in iBooks to model the stages of mitosis using the playdoh 4. When all five plates have completed models please use your phone (or my phone) to take a picture and upload the photo to notability. Once the photos are in notability please label the chromatids, sister chromatids (if present), centrioles, and spindle fibers.

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