Life Cycles and Evolution of Developmental Patterns by dffhrtcv3

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									Life Cycles and Evolution of
  Developmental Patterns
          Frog Development
 Overview of development
Frog Life Cycle
Gametogenesis and Fertilization
 What role do hormones play in these
  processes?
  – estrogen and vitellogenin
  – progesterone and meiosis
 Seasonal effects
  – females
  – males
Cleavage
Cleavage
Gastrulation
Gastrulation
Organogenesis
         Developmental Patterns
           Unicellular Protists
 How were acetabularia used to illustrate the role of
  the nucleus in development?
Developmental Patterns
  Unicellular Protists
        Developmental Patterns
          Unicellular Protists
 Conjugation in paramecia
        Developmental Patterns
          Unicellular Protists
 sexual reproduction in chlamydomonas
Evolution of Multicellular Organisms
 beginnings of differentiation
Evolution of Multicellular Organisms
 simplest organisms with sperm and eggs
Evolution of Multicellular Organisms
 Life cycle of Dictyostelium
Evolution of Multicellular Organisms
 Life cycle of Dictyostelium
Evolution of Multicellular Organisms




 What causes the myxamoebae to aggregate?
Evolution of Multicellular Organisms
 What kinds of molecules promote cell adhesion in
  dictyostelium?
Evolution of Multicellular Organisms
 What controls differentiation in dictyostelium?
Overview of Metazoan Development

								
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