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Campbell Biology | 10th Edition | ISBN: 9780321775658 | Authors: Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson
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MAKE CONNECTIONS Historically, annelids and arthropods were viewed as closely related

Chapter 33, Problem 3

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QUESTION:

MAKE CONNECTIONS Historically, annelids and arthropods were viewed as closely related because both have body segmentation. Yet DNA sequence data indicate that annelids belong to one clade (Lophotrochozoa) and arthropods to another (Ecdysozoa). Could traditional and molecular hypotheses be tested by studying the Hox genes that control body segmentation (see Concept 21.6)? Explain.

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QUESTION:

MAKE CONNECTIONS Historically, annelids and arthropods were viewed as closely related because both have body segmentation. Yet DNA sequence data indicate that annelids belong to one clade (Lophotrochozoa) and arthropods to another (Ecdysozoa). Could traditional and molecular hypotheses be tested by studying the Hox genes that control body segmentation (see Concept 21.6)? Explain.

ANSWER:


Yes, traditional and molecular hypotheses could be tested by studying the Hox genes that control body segmentation. By comparing the Hox genes of annelids and arthropods, it would be possible to identify similarities and differences in the genes re

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