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Chap 19 notes - Animal Development Chapter 19 Learning...

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Animal Development Chapter 19 Learning Objective 1 * Analyze the relationship between cell determination and cell differentiation, and between pattern formation and morphogenesis Cell Differentiation * Process by which a cell becomes specialized to carry out specific functions * Cell determination * molecular events leading to cell differentiation * Cell becomes committed to a certain task/specialization * Differential gene expression * Stem cells * relatively undifferentiated cells * Retain the ability to differentiated when needed Morphogenesis * The development of form * Progessive organization of tissues and organs * occurs through pattern formation * In pattern formation, cells may * communicate by signaling * Planned cell migrate * undergo changes in shape * undergo apoptosis (programmed cell death) KEY CONCEPTS * The development of form requires not only cell division and growth but also cell determination and cell differentiation, and pattern formation and morphogenesis Learning Objective 2 * Relate differential gene expression to nuclear equivalence Gene Expression
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