BIO 1406/07 W/CONNECT/LM NEW >IC<
16th Edition
ISBN: 9781260075762
Author: Raven
Publisher: MCG CUSTOM
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Chapter 25, Problem 3A
The Eda allele that causes reduced armor originated about 2 MYA in marine stickleback fish and persists with a frequency of about 1% in marine environments. The frequency is much higher in freshwater populations. Apply your understanding of natural selection to determine the most likely reason for the difference in Eda allele frequency.
a. The Eda allele causing reduced armor has evolved repeatedly in marine and freshwater environments.
b. Fish have many predators in the marine environment and fish with reduced armor have reduced fitness.
c. There is negative selection for armor in freshwater because building armor is energetically expensive.
d. Both b and c are valid.
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Chapter 25 Solutions
BIO 1406/07 W/CONNECT/LM NEW >IC<
Ch. 25 - Heterochrony is a. the alteration of the spatial...Ch. 25 - Vast differences in the phenotypes of organisms as...Ch. 25 - Homoplastic structures a can Involve convergence...Ch. 25 - Hox genes are a. found in both plants and animals....Ch. 25 - The Brachyury and Thx5 in vertebrates and the Ap3...Ch. 25 - Which of the following statements about Pax6 is...Ch. 25 - Which of the following statements about TbxS is...Ch. 25 - Prob. 8UCh. 25 - Transcription factors are a. genes. b. sequences...Ch. 25 - Independently derived mutations of the CTC gene in...
Ch. 25 - Prob. 1ACh. 25 - Prob. 2ACh. 25 - The Eda allele that causes reduced armor...Ch. 25 - Prob. 4ACh. 25 - The paired-like homeodomain transcription factor 1...Ch. 25 - From the chapter on evolution of development it...Ch. 25 - Phenotypic diversity among major groups of...Ch. 25 - Critique the argument that eyes have multiple...Ch. 25 - Prob. 5SCh. 25 - Having read all of this chapter return to the clam...
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