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icq5 - MCDB 4650 Class 5 Spring 2009 are P-granules which...

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MCDB 4650 Class 5 Spring 2009 Cleavage and segregation of determinants in C.elegans embryos Diagrammed below at the top is a just fertilized C. elegans embryo. The internal dots are P-granules, which will act as determinants for the germ line during development. At the bottom is shown the 4-cell embryo, with all the P-granules in the germline cell P2 With your group, diagram the intermediate cleavage stages and the mechanisms that allow the P-granules to end up there. Show the location of P-granules and the orientations of mitotic spindles and cleavage planes at each division, and indicate on the right any special mechanisms that are required to move P-granules or change the default orientation of cleavage spindles.
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MCDB 4650 DEVELOPMENTAL BIOLOGY Spring 2009 Clicker questions 1. Which of the following statements best describes the process of fertilization? a) the egg reacts to signals from the sperm. b) the sperm reacts to signals from the egg. c) each of the two gametes reacts to signal from the other.
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