BIOL 430 2010 Lecture 2 handout 6 slides (1)

BIOL 430 2010 Lecture 2 handout 6 slides (1) - Lecture #2...

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1 Lecture #2 Processes of Development, and Cell Behaviors January 13 th , 2010 BIOL 430 Molecular Genetics of Development 2010 Dr. Ian Chin-Sang (www.chin-sang.ca) Mosaic vs. regulative development Frog development, tissues, terms, Genes control development Gene regulation Review of BIOL 330 e-mail addresses: If you have a preferred e-mail address such as a @hotmail or other that you use instead of the Queen’s e-mail eg. 9xx2@queensu.ca Please send me an e-mail with your preferred e-mail address Notes and Announcements : Presentation partners and articles will be posted by next BIOL 430 Molecular Genetics of Development 2010 Dr. Ian Chin-Sang (www.chin-sang.ca) A word about lecture notes and class attendance. Friday (Jan. 30 th ). If you have a partner let me know ASAP Class Poll on Quizzes: Yes or No Two Fundamental Questions: 1. How does the fertilized egg give rise to the adult body plan? 2. How does and adult yet produce another body? BIOL 430 Molecular Genetics of Development 2010 Dr. Ian Chin-Sang (www.chin-sang.ca) The Questions of Developmental Biology Cell Division? Cell Differentiation? BIOL 430 Molecular Genetics of Development 2010 Dr. Ian Chin-Sang (www.chin-sang.ca) Morphogenesis? Pattern Formation? What processes are needed for development? 1. Cell divisions 2. Cell differentiation 3. Pattern formation Note: We conveniently distinguish these 5 main developmental processes— But by no means they are mutually exclusive— In reality they overlap with and influence one another significantly during development. 4. Morphogenesis 5. Growth BIOL 430 Molecular Genetics of Development 2010 Dr. Ian Chin-Sang (www.chin-sang.ca) Five cell behaviors • Gene expression results in cell behavior and development. Genes control cell behavior by controlling which proteins are made by the cell. • Gene activity gives cell identity. 1. Cell-cell communication 2. Cell shape changes 3. Cell movement 4. Cell proliferation 5. Cell death (apoptosis) BIOL 430 Molecular Genetics of Development 2010 Dr. Ian Chin-Sang (www.chin-sang.ca)
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2 A/P axis: anterior ~ head; posterior ~ tail. D/V axis: dorsal ~ upper or back; ventral ~ lower or front. The mouth is always on the ventral side (note dorsal ventral not used in human anatomy and the terms superior and inferior replace cranial and caudal) Cranial - Cephalic, refers to the head (anterior) Words and terms you should know Caudal -refers to tail or tail-like (posterior) P/D : proximal ~ near; distal ~ far. from a central point Lateral : to the side. Medial
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BIOL 430 2010 Lecture 2 handout 6 slides (1) - Lecture #2...

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