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Life Cycles and Evolution of Developmental Patterns

Dive into the intriguing world of developmental patterns in frogs and unicellular protists, from gametogenesis to organogenesis. Explore the roles of hormones, seasonal effects, and evolution of multicellular organisms. Discover the mechanisms of cleavage, gastrulation, and organ differentiation, shedding light on metazoan development.

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Life Cycles and Evolution of Developmental Patterns

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  1. Life Cycles and Evolution of Developmental Patterns

  2. Frog Development • Overview of development

  3. Frog Life Cycle

  4. Gametogenesis and Fertilization • What role do hormones play in these processes? • estrogen and vitellogenin • progesterone and meiosis • Seasonal effects • females • males

  5. Cleavage

  6. Cleavage

  7. Gastrulation

  8. Gastrulation

  9. Organogenesis

  10. Developmental PatternsUnicellular Protists • How were acetabularia used to illustrate the role of the nucleus in development?

  11. Developmental PatternsUnicellular Protists

  12. Developmental PatternsUnicellular Protists • Conjugation in paramecia

  13. Developmental PatternsUnicellular Protists • sexual reproduction in chlamydomonas

  14. Evolution of Multicellular Organisms • beginnings of differentiation

  15. Evolution of Multicellular Organisms • simplest organisms with sperm and eggs

  16. Evolution of Multicellular Organisms • Life cycle of Dictyostelium

  17. Evolution of Multicellular Organisms • Life cycle of Dictyostelium

  18. Evolution of Multicellular Organisms • What causes the myxamoebae to aggregate?

  19. Evolution of Multicellular Organisms • What kinds of molecules promote cell adhesion in dictyostelium?

  20. Evolution of Multicellular Organisms • What controls differentiation in dictyostelium?

  21. Overview of Metazoan Development

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