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Preformation vs. Epigenesis

Preformation vs. Epigenesis. Similarities Among Vertebrate Embryos. Development by Kingdom. Sexual Reproduction in the Unicellular Protist Chlamydomonas. Development in the Multicellular Protist Volvox. Life Cycle of the cellular slime mold, Dictyostelium discoideum.

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Preformation vs. Epigenesis

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  1. Preformation vs. Epigenesis

  2. Similarities Among Vertebrate Embryos

  3. Development by Kingdom

  4. Sexual Reproduction in the Unicellular Protist Chlamydomonas

  5. Development in the Multicellular Protist Volvox

  6. Life Cycle of the cellular slime mold, Dictyostelium discoideum

  7. Development by Kingdom

  8. Major Evolutionary Divergences in Metazoa

  9. Metazoan Life Cycles: Leopard Frog, Rana pipiens

  10. Developmental Model Organisms

  11. Major Evolutionary Divergences in Metazoa

  12. Nematodes(Caenorhabditis elegans)

  13. Major Evolutionary Divergences in Metazoa

  14. Arthropods- Insects- Fruit fly(Drosophila melanogaster)

  15. Embryogenesis in Drosophila

  16. Metamorphosis in Drosophila

  17. Major Evolutionary Divergences in Metazoa

  18. Echinoderms- Sea Urchin(Strongylocentrotus purpuratus)

  19. Major Evolutionary Divergences in Metazoa

  20. adult Urochordates- Tunicates (sea squirts) Ciona intestinalis Styela partita larva

  21. Major Evolutionary Divergences in Metazoa

  22. Similarities Among Vertebrate Embryos

  23. Vertebrates- Amphibians- Frog(Xenopus laevis)

  24. Xenopus egg

  25. Vertebrates- Fish- Zebrafish(Danio rerio)

  26. Vertebrates- Birds- Chicken(Gallus)

  27. Vertebrates- Mammals- Mouse(Mus musculus)

  28. Mouse Embryogenesis

  29. Development by Kingdom

  30. Plants- Thale cress(Arabidopsis thaliana)

  31. Arabidopsis flower

  32. Arabidopsis Embryogenesis

  33. Duckbilled Platypus

  34. Developmental Toolbox • Observational Tools • Fate mapping, lineage analysis • Experimental Tools • Physical manipulation • Ablation, isolation, transplantation • Genetic manipulation • Mutations, gene interference, mosaics, chimerics

  35. Developmental Toolbox • Observational Tools • Fate mapping, lineage analysis • Experimental Tools • Physical manipulation • Ablation, isolation, transplantation • Genetic manipulation • Mutations, gene interference, mosaics, chimerics

  36. Embryo Fate Mapping Techniques • Direct visualization of transparent embryos • Vital dye staining • Injection of fluorescent dye or radiolabel • Genetic marking

  37. Major Evolutionary Divergences in Metazoa

  38. Early Development in Tunicates

  39. Conklin’s Illustrations of Tunicate Development

  40. Tunicate Embryo Fate Map

  41. Vital Dye Fate Mapping

  42. Fate Mapping Using a Fluorescent Dye

  43. Genetic Markers as Cell Lineage Tracers

  44. Neural Crest Cell Migration

  45. Experimental Manipulations Physical: Ablation Isolation Transplantation Genetic

  46. Ablation Experiment (aka. Defect or Removal)

  47. Isolation Experiment (aka. Ligation)

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