Gen Combo Ll Biology; Connect W/learnsmart Labs Access Card
Gen Combo Ll Biology; Connect W/learnsmart Labs Access Card
4th Edition
ISBN: 9781259853197
Author: Robert Brooker
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 29, Problem 9TY
Summary Introduction

Introduction: Pteridophytes are also divided into three divisions: the horsetails, ferns, and the lycophytes. The fern do not have seeds and flowers; they reproduce by the spores. They are different from mosses because of having specialized tissues known as vascular tissues.

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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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