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The Cell Cycle & Cell Division

The Cell Cycle & Cell Division. The Cell Cycle. http://www.nobel.se/medicine/laureates/2001/press.html. Animated Cycle. http://www.cellsalive.com/cell_cycle.htm. Animal Cell DNA replicated Organelles replicated Cell increases in size. Plant Cell DNA replicated Organelles replicated

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The Cell Cycle & Cell Division

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  1. The Cell Cycle & Cell Division

  2. The Cell Cycle http://www.nobel.se/medicine/laureates/2001/press.html

  3. Animated Cycle http://www.cellsalive.com/cell_cycle.htm

  4. Animal Cell DNA replicated Organelles replicated Cell increases in size Plant Cell DNA replicated Organelles replicated Cell increases in size InterphaseThe cell prepares for division (G1, S, G2)

  5. Interphase Plant Cell Animal Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

  6. MITOSIS

  7. Mitosis The process of cell division which results in the production of two daughter cells from a single parent cell. The daughter cells are identical to one another and to the original parent cell.

  8. Mitosis can be divided into stages • Prophase • Metaphase • Anaphase • Telophase & Cytokinesis

  9. Animal Cell DNA coils into chromosomes Plant cell DNA coils into chromosomes ProphaseThe cell prepares for nuclear division

  10. Prophase Plant Cell Animal Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

  11. Animal Cell Chromosomes line up at the center of the cell Spindle fibers attach from daughter cells to chromosomes at the centromere Plant Cell Chromosomes line up at the center of the cell Spindle fibers attach from daughter cells to chromosomes at the centromere MetaphaseThe cell prepares chromosomes for division

  12. Metaphase Plant Cell Animal Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

  13. Animal Cell Spindle fibers pull chromosomes apart ½ of each chromosome (called chromotid) moves to each daughter cell Plant Cell Spindle fibers pull chromosomes apart ½ of each chromosome (called chromotid) moves to each daughter cell AnaphaseThe chromosomes divide

  14. Anaphase Plant Cell Animal Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

  15. Telophase/CytokinesisThe cytoplasm divides Animal Cell DNA spreads out 2 nuclei form Cytokinesis: Cell membrane pinches in to form the 2 new daughter cells Plant Cell DNA spreads out 2 nuclei form Cytokinesis: New cell wall forms between to nuclei to form the 2 new daughter cells

  16. Telophase Cytokinesis

  17. Telophase Plant Cell Animal Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

  18. MitosisAnimation http://www.cellsalive.com/mitosis.htm

  19. Animal Mitosis -- Review

  20. Plant Mitosis -- Review

  21. Cell Cycle Review

  22. MEIOSIS

  23. Meiosis Meiosis is thetype of cell division by which gametes (sex cells: eggs and sperm) are produced. One parent cell produces four daughter cells. Daughter cells have half the number of chromosomes found in the original parent cell

  24. Meiosis During meiosis, DNA replicates once, but the nucleus divides twice.

  25. Meiosis • There are 2 parts of meiosis • Meiosis 1 • Meiosis 2

  26. Meiosis I First division of meiosis

  27. Meiosis 1 • Prophase 1: Each chromosome duplicates and remains closely associated. These are called sister chromatids. Homologous chromosomes will cross over • Metaphase 1: Chromosome pairs align at the middle of the cell. • Anaphase 1: Chromosome pairs are pulled apart with sister chromatids remaining together. • Telophase 1: Two daughter cells are formed with each daughter containing only one chromosome of the chromosome pair.

  28. Prophase I http://everyschool.org/u/logan/cellreproductionx/rogersa/research/meiosis.html

  29. Prophase I http://everyschool.org/u/logan/cellreproductionx/rogersa/research/meiosis.html

  30. Metaphase I http://everyschool.org/u/logan/cellreproductionx/rogersa/research/meiosis.html

  31. Telophase I http://everyschool.org/u/logan/cellreproductionx/rogersa/research/meiosis.html

  32. Meiosis Second Division of Meiosis

  33. Second Division of Meiosis • Prophase 2: DNA does not replicate. The cell prepares for Meiosis 2 • Metaphase 2: Chromosomes line up in the middle of the cell • Anaphase 2: Centromeres divide and sister chromatids move separately to each pole (or side) of the cell. • Telophase 2: 4 nuclei begin to form and the two cells begin to pinch into 4 cells • Cytokinesis: Cell division is complete and four haploid daughter cells are formed .

  34. Prophase II http://everyschool.org/u/logan/cellreproductionx/rogersa/research/meiosis.html

  35. Metaphase II http://everyschool.org/u/logan/cellreproductionx/rogersa/research/meiosis.html

  36. Telophase II http://everyschool.org/u/logan/cellreproductionx/rogersa/research/meiosis.html

  37. Meiosis http://www.biosci.uga.edu/almanac/bio_103/notes/apr_3.html.

  38. Meiosis Animation http://www.rothamsted.bbsrc.ac.uk/notebook/courses/guide/movie/meiosis.htm

  39. Mitosis Asexual Cell divides once Two diploid daughter cells Genetic information is identical Meiosis Sexual Cell divides twice Four haploid daughter cells Genetic information is different Differences in Mitosis & Meiosis

  40. Comparison Animations http://www.pbs.org/wgbh/nova/baby/divi_flash.html http://www.usoe.k12.ut.us/curr/science/sciber00/7th/genetics/sciber/animatin.htm

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