BIOLOGY (LL)
BIOLOGY (LL)
5th Edition
ISBN: 9781264115495
Author: BROOKER
Publisher: MCG
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Chapter 43, Problem 5TY
Summary Introduction

Introduction: Different organisms have different types of nervous system. For example, jellyfishes have a simple nerve net and humans contain a well-defined complex nervous system. The nervous system of humans is composed of CNS and PNS. CNS stands for “Central nervous system” and it is composed of brain and the spinal cord. However, PNS or “Peripheral nervous system” contains the neurons that connect brain and spinal cord to each other and to other parts of the body.

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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?
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