Cellular Development - Lecture 17

Cellular Development - Lecture 17 - Cellular Development...

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Cellular Development Raven Chapter 19 .
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Fig. 19.1.a
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Fig. 19.1.b blastomeres
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Fig. 19.1.c
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Development : systematic gene directed changes through which an organism forms the successive stages of a life cycle Four sub-processes: 1.Growth - cell division 3. Differentiation 2. Pattern Formation. 4. Morphogenesis
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Fig. 19.2 1. Growth - Cell Division Stores of mRNA available in unfertilized egg. Periodically translated.
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Fig. 19.3.b Caenorhabditis Elegans Length = 1mm, Adult worm = 959 cells, transparent
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Fig. 19.3.a 302 cells in nervous system 131 cells programmed to die
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Fig. 19.4 Blastomeres - some cells now have a fate Others - stem cells - continue to divide Pluripotent - can become multiple different cell types Totipotent - can become any different cell type.
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2. Cell Differentiation What does this mean? Proteins they express Morphologies specialized functions Cell determination - commits a cell to a particular pathway
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Cellular Development - Lecture 17 - Cellular Development...

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