Chpt9.2 mitosis
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Chpt9.2 mitosis

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Chpt9.2 mitosis Chpt9.2 mitosis Presentation Transcript

  • Phases of the Cell Cycle Pgs. 246-252 Interphase – G1 Rapid growth & activity Interphase – S Growth & DNA replication Interphase – G2 Growth & prep for mitosis,centrioles Prophase Chromosomes become visible Metaphase Chromosomes line up across center Anaphase Chromatids separate & move to ends Telophase Nuclear division is completed Cytokinesis Division of the cytoplasm
  • Interphase
    • Busiest part of the cell cycle
    • Cells make ATP
    • Repair themselves
    • Excrete wastes
    • Make proteins
    • Produce new organelles
    • Copy chromosomes
  • Prophase
    • Longest phase of mitosis
    • Chromatin coils into visible chromosomes
    • Nucleus begins to disappear
    • Centrioles migrate to opposite ends of the cell
    • Spindle fibers are formed between the centrioles
  • Metaphase
    • Shortest phase
    • Chromosomes line up across the center of the cell
    • Microtubules (spindle fiber) attach to centromeres
  • Anaphase
    • Centromeres split
    • Sister chromatids are pulled apart to opposite poles of the cell.
  • Telophase
    • Final phase
    • Nuclear envelope and nucleous reappear
    • Chromosomes begin to uncoil
    • Double membrane
    • begins to form
    • Nuclear division is
    • complete
  • Cytokinesis (late telophase)
    • Division of the cytoplasm occurs
    • 2 daughter cells are formed
    • Each new cell has a complete set of chromosomes
    • New cell begins interphase
  • Cell Cycle Animation
  • Cell Cycle
  • Mitosis Video