Lec60_Animal_Dev_I_09 - 3/2/09! Animal Development!...

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3/2/09 1 Animal Development Reminder Bring your laptop to lab for week 3 DNA lab What is the vegetal pole of an embryo? A. the end at which sperm penetrate B. the end at which yolk is most concentrated C. the end which will later become the grey crescent D. the end that is not bisected by any of the first three cleavage divisions E. the end in which the blastocoel will develop What is the vegetal pole of an embryo? A. the end at which sperm penetrate B. the end at which yolk is most concentrated C. the end which will later become the grey crescent D. the end that is not bisected by any of the first three cleavage divisions E. the end in which the blastocoel will develop * Intricate acrosomal reaction is a fast block to polyspermy. The cortical reaction is a slow block. Both insure fertilization occurs by correct, and fully functional, sperm Fertilization tThe acrosomal reaction is caused by a spike in [Ca 2+ ] occuring as a wave. [Ca
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Lec60_Animal_Dev_I_09 - 3/2/09! Animal Development!...

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