Biology (11th Edition)

Published by McGraw-Hill Education
ISBN 10: 1-25918-813-2
ISBN 13: 978-1-25918-813-8

Chapter 25 - Evolution of Development - Review Questions - Apply: 1

Answer

C.

Work Step by Step

For two homologous genes to regulate different processes in different organisms, the expression pattern of that gene itself must be changed between the two homologs (C.). D. is wrong because Tbx5 is not a signal molecule, and A. is wrong since it is not part of bone. B. can be excluded since Tbx5 does bind to FGF-10, but it is not a transcription factor.
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