2) concepts

2) concepts - 8/25/10 Developmental Biology BIOL 3090-001...

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8/25/10 1 Developmental Biology BIOL 3090-001 Lecture 2) Concepts in Development Lecture Outline Developmental processes: Cleavage, pattern formation/morphogenesis, differentiation and growth Cell behavior Gene regulation Development is progressive Inductive interactions Cytoplasmic determinants Drosophila life cycle and overall development
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8/25/10 2 Cleavage • Division of the fertilized egg into a larger number of cells • No increase in cell mass Types of Cleavage
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8/25/10 3 Pattern Formation/Morphogenesis Often involves multiple cell behaviors The first pattern formed in development is the overall Morphogenesis: Gastrulation • Gastrulation: The dramatic restructuring of the embryo mainly by cell migrations • Blastula vs gastrula • Protostome vs deuterostome
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8/25/10 4 Pattern Formation: Germ Layers Regions of the early embryo that always develop into specific tissue types Triploblasts Cell Differentiation The process by which cells become structurally and functionally different from one another At least 250 different cell types in humans
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8/25/10 5 Growth Very little growth in early development
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This note was uploaded on 09/18/2011 for the course BIOL 3090 taught by Professor Steven during the Spring '10 term at Toledo.

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2) concepts - 8/25/10 Developmental Biology BIOL 3090-001...

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