CAMPBELL BIOLOGY IN FOCUS (LL)-W/MOD.MA
3rd Edition
ISBN: 9780135686065
Author: Urry
Publisher: PEARSON
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Chapter 22.4, Problem 2CC
Summarize evidence that the yup flower-color locus acts as a prezygotic barrier to reproduction in two species of monkey flowers. Do these results demonstrate that the yup locus alone controls barriers to reproduction between these species? Explain.
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In the fish Species a, the expression of different combinations of four Hox genes results in structural differences in tissues and organs along the anterior-posterior axis. Figure 3 shows the expression pattern of four genes, i.e. Genes 1 – 4, and the tissue produced along the embryonic anterior - posterior plane of fish Species a wild type. The influence of Hox genes on the formation of specific types of tissue can be determined by introducing gain-of-function and loss-of-function mutations in specific Hox genes. Looking at Figure 3, predict what would happen to each one of the four types of tissues, if the expression of gene 3 was expanded anteriorly by a gain-of-function mutation so that the pattern of gene 3 expression would be the same as that of gene 2.
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Chapter 22 Solutions
CAMPBELL BIOLOGY IN FOCUS (LL)-W/MOD.MA
Ch. 22.1 - Prob. 1CCCh. 22.1 - WHAT IF? Suppose you are studying two bird species...Ch. 22.2 - Contrast allopatric and sympatric speciation....Ch. 22.2 - WHAT IF? Is allopatric speciation more likely to...Ch. 22.2 - MAKE CONNECTIONS Review the process of meiosis in...Ch. 22.3 - What are hybrid zones, and why can they be viewed...Ch. 22.3 - WHAT IF? Consider two species that diverged while...Ch. 22.4 - Speciation can occur rapidly between diverging...Ch. 22.4 - Summarize evidence that the yup flower-color locus...Ch. 22.4 - MAKE CONNECTIONS Compare Figure 10.11 with Figure...
Ch. 22 - The largest unit within which gene flow can...Ch. 22 - Males of different species of the fruit fly...Ch. 22 - According to the punctuated equilibria model, A....Ch. 22 - Bird guides once listed the myrtle warbler and...Ch. 22 - Which of the following factors would not...Ch. 22 - Plant species A has a diploid number of 12. Plant...Ch. 22 - SCIENCE, TECHNOLOGY, AND SOCIETY In the United...Ch. 22 - SCIENTIFIC INQUIRY DRAW IT In this chapter, you...Ch. 22 - FOCUS ON EVOLUTION Explain the biological basis...Ch. 22 - FOCUS ON INFORMATION In sexually reproducing...Ch. 22 - Suppose that females of one population of straw-...
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