Biology (MindTap Course List)
11th Edition
ISBN: 9781337392938
Author: Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher: Cengage Learning
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Textbook Question
Chapter 11, Problem 16TYU
EVOLUTION LINK Darwin’s theory of evolution by natural selection is based on four observations about the natural world. One of them is that each individual has a combination of traits that makes it uniquely different. Darwin recognized that much of this variation among individuals must be inherited, but he did not know about Mendel’s mechanism of inheritance. Based on what you have learned in this chapter, briefly explain the variation among individuals that Darwin observed.
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Darwin’s insights into the role of selection in evolution began with close observations of the enormous phenotypic variation among different pure-breeding varieties of domesticated pigeons. Study of varieties found in any domesticated species could provide similar insights. For comparison, we’d like to know what degree of phenotypic variation might be expected among the domesticated peas available to Mendel.a. Starting with an F1 hybrid heterozygous for phenotypically distinguishable allele pairs (one of which is completely dominant to the other) at 7 genes, how many different phenotypes would be expected in the F2 generation?b. It might take a large number of F2 individuals to observe all of these phenotypic combinations, depending on the frequency of the rarest phenotype. What is the expected rarest phenotype and what it its expected frequency among the F2 individuals?c. How many different phenotypes could have been observed in the F2 generation if all of the allele pairs of the 7…
Darwin’s insights into the role of selection in evolution began with close observations of the enormous phenotypic variation among different pure-breeding varieties of domesticated pigeons. Study of varieties found in any domesticated species could provide similar insights. For comparison, we’d like to know what degree of phenotypic variation might be expected among the domesticated peas available to Mendel.d. In the F10 generation from the above hybrid, how many phenotypically distinguishable pure-breeding varieties could be observed? [part c was 2187]e. [Note: this one requires use of combinations; it is also a significantly more difficult problem.] Mendel began his work with pairs of varieties from the breeders that differed from each other in just one trait (corresponding to one gene difference, as we now know) out of the 7 traits he studied. These pairs could be obtained by self-pollinating an individual from an advanced generation that was pure-breeding for 6 of the traits but…
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Matt observed 80 green frogs and 20 brown frogs. He knows from published studies, brazilian frog coloration derives from two alleles (p=green and q=brown). After genotyping the green frogs he finds they are homozygous for the p allele. What percentage of heterozygous frogs should he expect to find?
Chapter 11 Solutions
Biology (MindTap Course List)
Ch. 11.1 - Define the terms phenotype, genotype, locus,...Ch. 11.1 - Describe Mendels principles of segregation and...Ch. 11.1 - Distinguish among monohybrid, dihybrid, and test...Ch. 11.1 - Explain Mendels principles of segregation and...Ch. 11.1 - What is the maximum number of different alleles...Ch. 11.1 - Can Mendels principle of segregation be...Ch. 11.1 - Prob. 3CCh. 11.2 - PREDICT Use the rules of probability to answer the...Ch. 11.2 - In answering the previous question, did you use...Ch. 11.3 - Define linkage and relate it to specific events in...
Ch. 11.3 - Show how data from a two-point test cross can be...Ch. 11.3 - Discuss the genetic determination of sex and the...Ch. 11.3 - What ratio of genotypes to phenotypes is observed...Ch. 11.3 - Prob. 2CCh. 11.3 - CONNECT Two loci exhibit 5% recombination between...Ch. 11.3 - Which chromosome determines the male sex in humans...Ch. 11.3 - Prob. 5CCh. 11.4 - Explain some of the ways genes may interact to...Ch. 11.4 - Distinguish among incomplete dominance,...Ch. 11.4 - Prob. 11LOCh. 11.4 - Prob. 1CCh. 11.4 - What is the difference between multiple alleles...Ch. 11.4 - Prob. 3CCh. 11.4 - Prob. 4CCh. 11 - One of the autosomal loci controlling eye color in...Ch. 11 - The F1 flies described in question 1 were mated...Ch. 11 - The type of cross described in question 2 is (a)...Ch. 11 - Individuals of genotype AaBb were crossed with...Ch. 11 - Assume that the ratio of females to males is 1:1....Ch. 11 - Redgreen color blindness is an X-linked recessive...Ch. 11 - When two long-winged flies were mated, the...Ch. 11 - The long hair of Persian cats is recessive to the...Ch. 11 - Mr. and Mrs. Smith are concerned because their own...Ch. 11 - A walnut comb rooster is mated to three hens. Hen...Ch. 11 - Individuals of genotype AaBb were mated to...Ch. 11 - Genes A and B are 6 map units apart, and A and C...Ch. 11 - VISUALIZE Sketch a series of diagrams showing each...Ch. 11 - Can you always ascertain an organisms genotype for...Ch. 11 - CONNECT Compare the mechanisms of genetic...Ch. 11 - EVOLUTION LINK Darwins theory of evolution by...Ch. 11 - INTERPRET DATA Using the graph in Figure 11-20,...
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