Biological Science (6th Edition)
6th Edition
ISBN: 9780321976499
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Emily Taylor, Greg Podgorski, Jeff Carmichael
Publisher: PEARSON
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Chapter 31, Problem 12PIAT
Hox genes are known to play a role in establishing the anterior- to-posterior identities of body regions of most animals. Michalis Averof and Nipam Patel compared the expression of Ubx-AbdAHox genes in different thorax segments during embryonic development in four crustaceans. The blue appendages in the diagram below represent maxillipeds; red appendages are legs (head appendages not shown). Which hypothesis about the relationship between Ubx-AbdA expression and the origin of maxillipeds do you think emerged from the data?
a. Maxillipeds were lost in segments where Ubx-AbdA genes were expressed.
b. Maxillipeds arose in segments where Ubx-AbdA genes were no longer expressed.
c. Maxillipeds arose in segments where Ubx-AbdA genes were expressed.
d. The presence of maxillipeds does not correlate with the pattern of Ubx-AbdA gene expression.
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Chapter 31 Solutions
Biological Science (6th Edition)
Ch. 31 - Prob. 1TYKCh. 31 - 2. What is the function of the arthropod...Ch. 31 - 3. One trait that is shared by the Lophotrochozoa...Ch. 31 - Which protostome phylum is distinguished by having...Ch. 31 - 5. Propose an explanation for why annelids and...Ch. 31 - 6. Use your understanding of protostome evolution...Ch. 31 - 7. Pose a hypothesis to explain why the evolution...Ch. 31 - 8. CAUTION Evaluate this statement Evolution is...Ch. 31 - Brachiopodais a phylum within the Lophotrochozoa....Ch. 31 - Adaptive radiations are said to occur when a...
Ch. 31 - How did feeding appendages called maxillipeds...Ch. 31 - 12. Hox genes are known to play a role in...Ch. 31 - 13. PROCESS OF SCIENCE Why are the evolutionary...Ch. 31 - Prob. 14PIATCh. 31 - 15. MODEL In amphipods, Ubx is normally not...Ch. 31 - True or False? The results in question 15 support...
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