Campbell Biology: Custom 10th Edition for University of South Florida
10th Edition
ISBN: 9781269866422
Author: Urry, Cain, Wasserman, Minorsky, Jackson Reece
Publisher: PEARSON C
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Chapter 24.2, Problem 2CC
Summary Introduction
To describe: Two mechanisms in sympatric populations which decrease the gene flow and making sympatric population most likely to occur.
Concept introduction:
In “sympatric
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Chapter 24 Solutions
Campbell Biology: Custom 10th Edition for University of South Florida
Ch. 24.1 - Prob. 1CCCh. 24.1 - WHAT IF? Suppose two bird species live in a...Ch. 24.2 - Summarize key differences between allopatric and...Ch. 24.2 - Prob. 2CCCh. 24.2 - WHAT IF? Is allopatric speciation more likely to...Ch. 24.2 - MAKE CONNECTIONS Review the process of meiosis in...Ch. 24.3 - 1. What are hybrid zones, and why can they be...Ch. 24.3 - WHAT IF? Consider two species that diverged while...Ch. 24.4 - Speciation can occur rapidly between diverging...Ch. 24.4 - Prob. 2CC
Ch. 24.4 - Prob. 3CCCh. 24 - Explain the role of gene flow in the biological...Ch. 24 - Can factors that cause sympatric speciation also...Ch. 24 - What factors can support the long-term stability...Ch. 24 - Is speciation something that happened only in the...Ch. 24 - The largest unit within which gene flow can...Ch. 24 - Prob. 2TYUCh. 24 - Prob. 3TYUCh. 24 - Prob. 4TYUCh. 24 - Which of the following factors would not...Ch. 24 - Plant species A has a diploid chromosome number of...Ch. 24 - Prob. 7TYUCh. 24 - SCIENTIFIC INQUIRY DRAW IT In this chapter, you...Ch. 24 - Prob. 9TYUCh. 24 - Prob. 10TYUCh. 24 - WRITE ABOUT A THEME: INFORMATION In sexually...Ch. 24 - Prob. 12TYU
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- David Hills of Baylor University noted that three closely related species of leopard frog (genus Rana) exhibit substantialbut not completepostzygotic reproductive isolation when crossed in the laboratory. Field surveys of numerous populations in Texas and surrounding states revealed that populations of the three species breed at various times during the year. Data on the breeding schedule of both allopatric and sympatric populations of these species are presented in the Figure below. Interpret the data in the figure and explain how they may demonstrate that these frogs experience prezygotic reproductive isolation in nature. What type of prezygotic reproductive isolation do the data suggest? Source: D.M. Hillis. 1981. Premating isolating mechanisms among three species of the Rana pipiens complex in Texas and southern Oklahoma. Copeia 1981:312-319.arrow_forwardThe first step leading to allopatric speciation is (a) hybrid inviability (b) hybrid breakdown (c) adaptive radiation (d) geographic isolation (e) paedomorphosisarrow_forwardIf a geographic barrier is removed and the two reunited populations intermingle and breed, what attributes must the offspring have in order for the two populations, according to the biological species concept, to be considered still the same species?arrow_forward
- Can factors that cause sympatric speciation also cause allopatricspeciation? Explain.arrow_forwardExplain why parapatric speciation is more likely to occur in sedentary organismsarrow_forwardName two events that must happen for both allopatric speciation and sympatric speciation to occur.arrow_forward
- Contrast allopatric speciation with sympatric speciation, and explain how each method may result in the creation of a new species.arrow_forwardWhat are the common mechanisms in Sympatric speciationarrow_forwardDescribe what happens to allele frequencies as a result of the bottleneck effect. Discuss the relevance of this effect with regard to species that are approaching extinction.arrow_forward
- What is required for sympatric speciation to occur? A. Continuous gene flow between different populations B. Geographic separation of populations C. Two populations that are different begin to reproduce and create hybrids D. Emergence of a reproductive barrierarrow_forwardDoes this model fit the idea that reproductive isolation can evolve in allopatry as just a byproduct of adaptation of each population to different environments? Why or why not?arrow_forwardShould you simulate gene flow (that is, the introduction of “outside” cats and their alleles into your “base” cat population)? If so, what would be a reasonable migration rate? What would be the frequency of the PKD allele in that “outside”/migrant population?arrow_forward
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