11/7/20111BIOLOGY 3 CH-8 REVIEWWORKSHOPContentsContentsContentsContentsCell CycleMitosisMeiosisWhy do cells divide?Why do cells divide?Why do cells divide?Why do cells divide?Cell growth, repair, and replacement of lost or damaged cells.11/7/20112Asexual Reproduction VS. Sexual ReproductionAsexual Reproduction VS. Sexual ReproductionAsexual Reproduction VS. Sexual ReproductionAsexual Reproduction VS. Sexual ReproductionFigure A: Asexual Reproduction; bacteria undergoing binary fission (genetically identical)Figure B: Sexual Reproduction; eukaryotic organism with offspring (not genetically identical)1122334455The Eukaryotic Cell Cycle and Mitosis11/7/20113The Eukaryotic Cell CycleThe Eukaryotic Mitotic Phase22 33445566Growth factors signal and cell cycle control system11/7/20114Meiosis and Crossing OverDiploid CellDiploid CellHaploid CellHaploid Cell(Germ Cell)(Sperm or Egg Cell)Meiosis IMeiosis IMeiosis IMeiosis IInterphaseProphase IMetaphase IAnaphase IMeiosis IIMeiosis IIMeiosis IIMeiosis II*Telophase I and CytokinesisProphase II Metaphase II Anaphase IITelophase II and Cytokinesis*still considered Meiosis I11/7/20115CROSSING OVER CROSSING OVER (CONT.)CROSSING OVER (CONT.)11/7/20116Sex chromosomesNondisjunctionAbnormal Numbers of Sex
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