BI 107AnDevel student

BI 107AnDevel student - 7/14/2010 Animal Development All...

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1 Animal Development BI 107 Dr Potter Animal Development All changes from conception to death Embryology – Changes from conception until birth/hatch – Subspeciality in biology Four Basic Processes Increase in cell number via mitosis Growth – increase in cell number Increase in cell size Cell differentiation – structural and/or functional specialization – often irreversible Morphogenesis / organogenesis – formation of body parts / organs Fertilization Union of sperm (n) and egg (n) – forms diploid (2n) zygote – determines gender of offspring stimulates zygote to divide by mitosis – stimulates zygote to divide by mitosis Fertilization Egg/ova – very large cell – much cytoplasm (stored nutrients) – outermost glycoprotein layer (jelly coat) vitelline laye – vitelline layer – normal cell plasma membrane Sperm – very small cell – stored enzymes in the “acrosome” Fertilization Sperm contacts egg of chromosomes)
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BI 107AnDevel student - 7/14/2010 Animal Development All...

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