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http://www.youtube.com/watch?v=mKWxeMMFTEU- 11 minutes process with music

http://www.youtube.com/watch?v=mKWxeMMFTEU- 11 minutes process with music . Mitosis- Cell division 46 chromo 2 cells, 46 chromo. Each Keeps chromo. # same Found in body cells Most common No genetic variation. Meiosis- Cell division 46 chromo  4 cells, 23 chromo each

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http://www.youtube.com/watch?v=mKWxeMMFTEU- 11 minutes process with music

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  1. http://www.youtube.com/watch?v=mKWxeMMFTEU- 11 minutes process with music

  2. Mitosis- Cell division 46 chromo2 cells, 46 chromo. Each Keeps chromo. # same Found in body cells Most common No genetic variation Meiosis- Cell division 46 chromo 4 cells, 23 chromo each Chromo. # cut in half Found in sex/germ cells ONLY Least common Most genetic variation ANIMATION OF COMPARISON ANIMATION 2 OF COMPARISON

  3. Meiosis • Definition: cell division to produce egg (ovule) or sperm (pollen) Meiosis I & Meiosis II

  4. Karyotypes • Display of chromosomes lined up in homologous pairs • Half inherited from male Half from female • Used for viewing #, size, shape, and banding • patterns of chromosomes

  5. Homologous Chromosomes: matching pair of chromosomes, one inherited from each parent

  6. “Diploid”or 2N: having two sets of chromosomes, body cells Humans 46 chromosomes “Haploid”or N: having one set of chromosomes, sex cells ( gametes) Humans 23 chromosomes

  7. Diploid vs. Haploid Exercises • Drosophilia have a diploid number of 8. What is the haploid? • Onions have a haploid number of 8. What is the 2N? • A horse’s 2N is 64. What is the 1N? • A body cell of an alligator has 32 chromosomes. Is this the diploid or haploid number? 4 16 32 Diploid

  8. Fertilization: when haploid sperm and egg meet, combining N chromosomes with N chromosomes = 2N zygote • Zygote: fertilized egg, 2N ____ ____ ____

  9. Oogenesis: Production of Egg • Female meiosis in the ovaries • Resulting cells: 1 egg, 3 polar bodies • Haploid

  10. Spermatogenesis:Production of Sperm • Male meiosis in testes • Resulting cells: 4 haploid sperm cells

  11. INDEPENDENT ASSORTMENT

  12. CELL THEN GOES THROUGH cytokinesis ”- NO INTERPHASE NO MORE DOUBLING OF CHROMOSOMES!!

  13. General Process of Meiosis MEIOSIS II (PMAT II & C) - Starts with 2 haploid cells - Prophase, Metaphase, Anaphase, Telophase II and Cytokinesis serve to separate the sister chromatids - Ending Cells: 4 cells, each with haploid chromosomes

  14. Meiosis II

  15. Another Animation of Overall Meiosis

  16. McGraw Hill Animation • http://highered.mcgraw-hill.com/olcweb/cgi/pluginpop.cgi?it=swf::535::535::/sites/dl/free/0072437316/120074/bio17.swf::Comparison%20of%20Meiosis%20and%20Mitosis

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