Loose Leaf For Integrated Principles Of Zoology
18th Edition
ISBN: 9781260411140
Author: Cleveland P Hickman Jr. Emeritus, Susan L. Keen, David J Eisenhour Professor PhD, Allan Larson, Helen I'Anson Associate Professor of Biology
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 6, Problem 21RQ
Is it easier for selection to remove a deleterious recessive allele from a randomly mating population or from a highly inbred population? Why?
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How can natural selection maintain harmful alleles in a population?
Why do recessive lethals persist in a population? Provide an example of a recessive lethal allele.
Is it true that natural selection allows only the better alleles to be passed onto the next generation? Please explain in details. The explaination should either agree or disagree, not be in the middle.
Chapter 6 Solutions
Loose Leaf For Integrated Principles Of Zoology
Ch. 6 - Briefly summarize Lamarcks concept of the...Ch. 6 - What is uniformitarianism? How did it influence...Ch. 6 - Why was the Beagles journey so important to...Ch. 6 - What was the key idea contained in Malthuss essay...Ch. 6 - Explain how each of the following contribute(s) to...Ch. 6 - How do modern evolutionists view the relationship...Ch. 6 - What are the important differences between the...Ch. 6 - What are reproductive barriers? How do premating...Ch. 6 - Under what conditions is sympatric speciation...Ch. 6 - What is the main evolutionary lesson provided by...
Ch. 6 - How is the observation of sporting mutations in...Ch. 6 - What does the theory of punctuated equilibrium...Ch. 6 - Describe the observations and inferences that...Ch. 6 - Identify the random and nonrandom components of...Ch. 6 - Describe some recurring criticisms of Darwins...Ch. 6 - Using the data shown in Figure 6.32, calculate the...Ch. 6 - Assume that you are sampling a trait in animal...Ch. 6 - If after studying a population for a trait...Ch. 6 - Explain why genetic drift is more powerful in...Ch. 6 - Describe how the effects of genetic drift and...Ch. 6 - Is it easier for selection to remove a deleterious...Ch. 6 - Distinguish between microevolution and...Ch. 6 - Explain why the evidence supporting Darwins theory...
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- In a Gecko population a group of Geckos skin color is controlled by one gene with two alleles "R"which codes for red and is dominant to "r" which codes for yellow and is recessive. If 100 Geckos are on the island and you gene test them to know their alleles you'll observe that 30 are homozygous red, 60 are heterozygous red, and 20 are homozygous recessive. Determine the Chi-square. assuming the original parents (Rr xRr).* Hint: determine the expected first before plugging into the equation awesome as this one? REGISTER NOW 13 5 11 4 Darrow_forwardYou are studying an autosome trait. There are two alleles, one showing complete dominance over the other. In a population, 84% of the individuals show the dominant phenotype. Assuming that this population is under Hardy-Weinberg equilibrium, which of the following statement is TRUE? 36% of individuals have the homozygous dominant genotype. 40% of the alleles in the population is recessive. 16% of the alleles in the population is recessive. 60% of individuals have the dominant alleles.arrow_forwardWhy does stabilizing selection decrease geneticdiversity?arrow_forward
- In a population that meets the Hardy–Weinberg equilibrium assumptions, 81% of the individuals are homozygous for a recessive allele. What percentage of the individuals would be expected to be heterozygous for this locus in the next generation?arrow_forwardSuppose that a population is at equilibrium between mutation and selection for a deleterious recessive allele, where s = 0.5 and μ = 10−5. What is the equilibrium frequency of the allele? What is the selection cost?arrow_forwardIf the initial allele frequencies are p = 0.5 and q = 0.5 and allele a is a lethal recessive, what will be the frequencies after 25 generations?arrow_forward
- Why is inbreeding not advisable?arrow_forwardWhy is genetic drift more significant in small populations? Why does it take longer for genetic drift to cause allele fixation in large populations than in small ones?arrow_forwardYou are studying a population of penguins in Antarctica. Your DNA analysis of this population reveals that for the feather color pattern gene, 35 individuals are homozygous dominant, 35 individuals are heterozygous, and 30 individuals are homozygous recessive. After observing this population for several years, you repeat your DNA study and find that the current generation of penguins has 15 individuals that are homozygous dominant, 10 individuals that are heterozygous, and 75 individuals that are homozygous recessive. Which of the following hypotheses for this data would be supported by this data based on your understanding of Hardy-Weinberg equilibrium? This population of penguins is maintaining Hardy-Weinberg equilibrium due to its large population size. The penguins are randomly choosing mates, which has led to Hardy-Weinberg equilibrium. The penguins are very isolated, which is preventing gene flow from affecting Hardy-Weinberg equilibrium. The recessive phenotype in…arrow_forward
- Is it likely that the selection coefficient (s) is similar in value for the three populations shown? Is it important to know if the amount of genetic variation for the trait under selection is approximately equal in all three populations in the graph? Why or why not?arrow_forwardLets say there exists a gene in the United States that comes in two alleles, the dominant A and the recessive a. The allele frequency of the dominant allele is 60% and the allele frequency of the recessive allele is 40% The population in genotyped and its found in the United States there are 36% Homozygous Dominant folk, 48% Homozygous Recessive folk, and 16% Homozygous recessive folk. Do you think there is any fitness advantage to any of these genotypes? Why or why not? View keyboard shortcutsarrow_forwardMany recessive traits are very rare in a population, but cystic fibrosis does not follow this pattern. In some populations, the frequency of carriers for cystic fibrosis is 1/35. Does this mean that cystic fibrosis is not more common in inbred mating, such as those between first cousins? Why or why not? Could the frequency of carriers in the general population be a reason that cystic fibrosis is such a common disease? After all, avoiding cousin matings might not help prevent cystic fibrosis in one’s children if unrelated carriers (heterozygotes) are common.arrow_forward
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