Genetics: Analysis and Principles
6th Edition
ISBN: 9781259616020
Author: Robert J. Brooker Professor Dr.
Publisher: McGraw-Hill Education
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Chapter 29, Problem 6EQ
A species of antelope has 20 chromosomes per set. The species is divided by a mountain range into two separate populations, which we will call the eastern and western population. In a comparison of the karyotypes of these two populations, it was discovered that the members of the eastern population are homozygous for a large inversion within chromosome 14. How would this inversion affect the interbreeding between the two populations? Could such an inversion play an important role in
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Chromosomal rearrangements are a source for reproductive barriers (low hybrid fitness) and are suppressors of recombination. The most commonly referred to rearrangements involved in human evolution are the formation of the Y chromosome and the variation of karyotypes between primates, especially the formation of human chromosome 2. Using the diagram below identify the types of chromosomal rearrangements and describe the impact on genotype.
You are studying an experimental population of Drosophila pseudoobscura flies to learn more about the evolution of resistance to insecticides. You
periodically treat the flies with weak doses of the insecticide DDT as a selective agent. At the end of the experiment, you estimate the relative fitnesses of
three chromosome inversions (see the table). Note - you can treat each chromosome inversion as an allele, and the combination as a genotype.
Genotype -->
Relative fitness -->
ST/ST
0.47
ST/AR
1.0
What kind of selection is occurring in this population?
heterozygote advantage
directional selection for the AR allele
negative frequency dependent selection
directional selection for the ST allele
Clear my selection
AR/AR
0.62
Imagine that Species A and Species B are closely related species. Species A has one
hemoglobin gene, located on chromosome 5. Species B has two hemoglobin genes,
one located on chromosome 5 and one located on chromosome 8.
Based solely on this information, it is possible that the ancestor of Species A and
Species B had one hemoglobin gene, and that a large-segment duplication followed
by a translocation resulted in the second hemoglobin gene of Species B.
True
False
Chapter 29 Solutions
Genetics: Analysis and Principles
Ch. 29.1 - Prob. 1COMQCh. 29.1 - Prob. 2COMQCh. 29.1 - 3. A pair of birds flies to a deserted island and...Ch. 29.1 - Prob. 4COMQCh. 29.2 - 1. Phylogenetic trees are based on
a. natural...Ch. 29.2 - Prob. 2COMQCh. 29.2 - An approach that is used to construct a...Ch. 29.2 - 4. Horizontal gene transfer is a process in which...Ch. 29.3 - Prob. 1COMQCh. 29.3 - Prob. 2COMQ
Ch. 29.3 - When the chromosomes of closely related species...Ch. 29 - 1. Discuss the two principles on which evolution...Ch. 29 - 2. Evolution, which involves genetic changes in a...Ch. 29 - Prob. 3CONQCh. 29 - Prob. 4CONQCh. 29 - 5. Would each of the following examples of...Ch. 29 - Distinguish between anagenesis and cladogenesis....Ch. 29 - 7. Describe three or more genetic mechanisms that...Ch. 29 - Explain the type of speciation (allopatric,...Ch. 29 - Prob. 9CONQCh. 29 - Prob. 10CONQCh. 29 - Discuss the major differences among allopatric,...Ch. 29 - Prob. 12CONQCh. 29 - Prob. 13CONQCh. 29 - Would the rate of deleterious or beneficial...Ch. 29 - 15. Which would you expect to exhibit a faster...Ch. 29 - Prob. 16CONQCh. 29 - 17. Plant seeds contain storage proteins that are...Ch. 29 - Take a look at the -globin and -globin amino acid...Ch. 29 - Compare and contrast the neutral theory of...Ch. 29 - Prob. 20CONQCh. 29 - 21. As discussed in Chapter 27, genetic variation...Ch. 29 - Prob. 22CONQCh. 29 - Two populations of snakes are separated by a...Ch. 29 - 2. Sympatric speciation by allotetraploidy has...Ch. 29 - 3. Two diploid species of closely related frogs,...Ch. 29 - A researcher sequenced a portion of a bacterial...Ch. 29 - F1hybrids between two species of cotton,Gossypium...Ch. 29 - 6. A species of antelope has 20 chromosomes per...Ch. 29 - Prob. 7EQCh. 29 - 8. Prehistoric specimens often contain minute...Ch. 29 - From the results of the experiment of Figure...Ch. 29 - InChapter 23, a technique called fluorescence in...Ch. 29 - Prob. 11EQCh. 29 - 12. Discuss how the principle of parsimony can be...Ch. 29 - 13. A homologous DNA region, which was 20,000 bp...Ch. 29 - Prob. 14EQCh. 29 - Prob. 1QSDCCh. 29 - 2. Compare the forms of speciation that are slow...Ch. 29 - 3. Do you think that Darwin would object to the...
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