EBK BIOLOGY
EBK BIOLOGY
11th Edition
ISBN: 8220106820636
Author: Martin
Publisher: CENGAGE L
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Chapter 53.4, Problem 1C

What are the advantages of semelparity? of iteroparity? Are there disadvantages?

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"One of the symmetry breaking events in mouse gastrulation requires the amplification of Nodal on the side of the embryo opposite to the Anterior Visceral Endoderm (AVE). Describe one way by which Nodal gets amplified in this region." My understanding of this is that there are a few ways nodal is amplified though I'm not sure if this is specifically occurs on the opposite side of the AVE.  1. pronodal cleaved by protease -> active nodal 2. Nodal -> BMP4 -> Wnt-> nodal 3. Nodal-> Nodal, Fox1 binding site  4. BMP4 on outside-> nodal  Are all of these occuring opposite to AVE?
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Explain each punnet square results (genotypes and probabilities)

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EBK BIOLOGY

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