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Cell Division

Cell Division. Prokaryotic binary fission sporulation Eukaryotic mitosis meiosis. Prokaryotic Cell Division - Binary Fission. Eukaryotic DNA is Packaged into Chromosomes. Chromosomes, Chromatids, and Chromatin. Karyotypes. spectral karyotype.

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Cell Division

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  1. Cell Division Prokaryotic binary fission sporulation Eukaryotic mitosis meiosis

  2. Prokaryotic Cell Division - Binary Fission

  3. EukaryoticDNA is Packaged into Chromosomes

  4. Chromosomes, Chromatids, and Chromatin

  5. Karyotypes spectral karyotype

  6. Numbers of Chromosomes in Some Plant and Animal Species Yeast Saccharomyces cerevisiae 16

  7. Mitosis

  8. The Mitotic Spindle Consists of Microtubules

  9. Mitosis

  10. Mitosis

  11. Cytokinesis Differs in Animal and Plant Cells

  12. The Eukaryotic Cell Cycle

  13. Checkpoints in Cell Cycle Progression G1 to S and G2 to M transitions are regulated by proteins called cyclin-dependent kinases (Cdks) and cyclins

  14. Cyclin proteins and Cdk activity Cyclin proteins are made and destroyed in a cyclic pattern during the cell cycle Cdks are activated by binding to one of several different cyclin proteins

  15. Cyclins and activation of Cdks

  16. Cyclin-Dependent Kinases and Cyclins Regulate Transitions in the Cell Cycle Cdk-cyclin complexes each phosphorylate different target proteins to regulate progression ofthe cell cycle MPF p53

  17. Disruption of Cell Cycle Control Cyclin-Cdk complexes act as checkpoints. When functioning properly, they allow or prevent passage to the next stage of the cell cycle In cancer cells, these checkpoints are often disrupted Rb/p105 (retinoblastoma) Loss of Rb permits unregulated cell division p53 Loss of p53 prevents synthesis of p21 which allows production of cyclin D

  18. Asexual Reproduction

  19. Meiosis and Alternation of Generations in Sexual Reproduction

  20. Meiosis I

  21. Crossing Over Forms Genetically Diverse Chromosomes Meiotic Recombination

  22. Chiasmata: Evidence of Exchange between Chromatids

  23. Meiosis I

  24. Meiosis I

  25. Meiosis II

  26. Meiosis II

  27. Meiosis II

  28. Mitosis and Meiosis: A Comparison

  29. Mitosis and Meiosis: A Comparison

  30. Nondisjunction Leads to Aneuploidy

  31. Apoptosis: Programmed Cell Death

  32. Two Different Ways for Cells to Die

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