Development - Development Development and Ontogeny:...

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Development 09/02/2008 08:31:00 Development and Ontogeny: Development = egg   mature person o Humans Adults gametes + fertilization (see chart on gamete formation) Fertilization process: Sperm contacts jelly outer layer of egg Acrosomal reaction Sperm begins to digest layer Sperm binds to the vitelline envelope Sperm breaks into egg with the egg nucleus Fertilized egg cleavages many times Cleavage=set of rapid cell divisions Blastula Gastrulation elongation Gastrula Organogenesis First trimester Second trimester Newborn Adult Insect (fruit flies)  o Adult gamete o Fertilization + cross-sectioning
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o Cleavage multi-nucleate o Blastula Gastrulation o Embryo segments (each has separate function) Hatching
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This note was uploaded on 03/31/2008 for the course BIO 116 taught by Professor Fink during the Winter '08 term at University of Michigan.

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Development - Development Development and Ontogeny:...

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