Lec25+2010 - Lecture 25: Vertebrate Development I Monday...

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Required reading Chapter 47: pp. 1021-1044 Recommended exercises Self Quiz Ch 47: 1, 3 Web/CD activity 47A, B Lecture 25: Vertebrate Development I Monday Nov. 22, 2010 Fall 2010, Bio 93, O’Dowd and Warrior, UCI - Copyright: All rights reserved
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1. Fertilization - fusion of sperm and egg nuclei and egg activation 2. Cleavage - rapid cell division without growth in size to generate a multicellular embryo 3. Gastrulation - mass cell movements to form three germ layers 4. Organogenesis - localized changes in tissue and cell shape Stages in embryonic development Fall 2010, Bio 93, O’Dowd and Warrior, UCI - Copyright: All rights reserved
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Stage 1. Fertilization The main function is to bring haploid nuclei of sperm and egg together to form a diploid zygote. There are 2 problems that could be disastrous to fertilization i. Fertilization by sperm from other species ii. Fertilization by more than one sperm Fall 2010, Bio 93, O’Dowd and Warrior, UCI - Copyright: All rights reserved
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Stage 1. Fertilization These problems are solved by two processes: Acrosomal Reaction - necessary for sperm penetration. Triggered by binding of receptors on the sperm surface to those on the egg.
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This note was uploaded on 01/25/2011 for the course CHEM 1LB taught by Professor Edwards during the Fall '08 term at UC Irvine.

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Lec25+2010 - Lecture 25: Vertebrate Development I Monday...

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