BIOLOGY CONNECT ACCESS CODE
BIOLOGY CONNECT ACCESS CODE
3rd Edition
ISBN: 9781259758324
Author: Hoefnagels
Publisher: MCG
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Chapter 9, Problem 4MCQ
Summary Introduction

Introduction:

Meiosis is a process of division of a single cell into four daughter cells. This type of division is mainly seen in the germ cells of humans. The daughter cells contain a half the number of chromosomes of their parental cell.

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You aim to test the hypothesis that the Tbx4 and Tbx5 genes inhibit each other's expression during limb development. With access to chicken embryos and viruses capable of overexpressing Tbx4 and Tbx5, describe an experiment to investigate whether these genes suppress each other's expression in the limb buds. What results would you expect if they do repress each other? What results would you expect if they do not repress each other?
You decide to delete Fgf4 and Fgf8 specifically in the limb bud. Explain why you would not knock out these genes in the entire embryo instead.
You implant an FGF10-coated bead into the anterior flank of a chicken embryo, directly below the level of the wing bud. What is the phenotype of the resulting ectopic limb?  Briefly describe the expected expression domains of 1) Shh, 2) Tbx4, and 3) Tbx5 in the resulting ectopic limb bud.
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General Embryology Review in 20 minutes; Author: Medical Animations;https://www.youtube.com/watch?v=4YKvVeVMmEE;License: Standard youtube license