EBK BIOLOGY
EBK BIOLOGY
11th Edition
ISBN: 8220101459800
Author: Byers
Publisher: PEARSON
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Chapter 1, Problem 2MC
Summary Introduction

Introduction:

Science is the systematic study of the natural world or the physical universe, by gathering experimental evidence. Science begins with a simple observation or the world around and then investigating for repeatable events either naturally or by experimental designs.

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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?
If four babies are born on a given day What is the chance all four will be girls? Use genetics laws
Explain each punnet square results (genotypes and probabilities)
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