In a population of wild squirrels, most of them have gray fur, butan occasional squirrel is completely white. If we let P and p represent dominant and recessive alleles, respectively, of a genethat encodes an enzyme necessary for pigment formation,which of the following statements do you think is most likely tobe correct?a. The white squirrels are pp, and the p allele is a loss-offunction allele.b. The gray squirrels are pp, and the p allele is a loss-offunction allele.c. The white squirrels are PP, and the P allele is a loss-offunction allele.d. The gray squirrels are PP, and the P allele is a loss-offunction allel

In a population of wild squirrels, most of them have gray fur, butan occasional squirrel is completely white. If we let P and p represent dominant and recessive alleles, respectively, of a genethat encodes an enzyme necessary for pigment formation,which of the following statements do you think is most likely tobe correct?a. The white squirrels are pp, and the p allele is a loss-offunction allele.b. The gray squirrels are pp, and the p allele is a loss-offunction allele.c. The white squirrels are PP, and the P allele is a loss-offunction allele.d. The gray squirrels are PP, and the P allele is a loss-offunction allel

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Description: In a population of wild squirrels, most of them have gray fur, butan occasional squirrel is completely white. If we let P and p represent dominant and recessive alleles, respectively, of a genethat encodes an enzyme necessary for pigment formation,wh

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter5: The Inheritance Of Complex Traits

Section: Chapter Questions

Problem 22QP: Height in humans is controlled by the additive action of genes and the action of environmental...

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A farmer wants to breed a variety of taller corn.a) How can the farmer use variation in the height of thecurrent corn plants to produce taller corn plants?b) Will the farmer's work be most effective if height incorn plants is determined by polygenic inheritance,multiple alleles, or co-dominant alleles? Explain.c) The farmer finds that many of the tallest corn plantsare also very susceptible to a particular disease. Howcould the farmer design an experiment to find outif the genes for height are linked to the genes forresistance to the disease?d) If these genes are linked, what steps could the farmertake to create a breed of corn that is taller and moredisease-resistant than the current corn crop?
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Alkaptonuria is a recessive autosomal genetic disorder associated with darkening of the urine. In the United States, approximately 1 out of every 250,000people has alkaptonuria.a. Assuming Hardy-Weinberg equilibrium, estimatethe frequency of the allele responsible for this trait.b. What proportion of people in the U.S. populationare carriers for this trait? In this population, whatis the ratio of carriers to individuals affected byalkaptonuria?c. If a woman without alkaptonuria had a child withthis trait with one husband then remarried, what isthe chance that a child produced by her secondmarriage would have alkaptonuria?d. Alkaptonuria is a relatively benign condition, sothere is little selective advantage to individualswith any genotype; as a result, your assumptionof Hardy-Weinberg equilibrium in part (a) is reasonable. Could you also use the assumption ofHardy-Weinberg equilibrium to estimate the allelefrequencies and carrier frequencies of more severerecessive autosomal conditions…
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Consider the case of a hypothetical genetic disease called WhySciEleven (WSE), an inherited disease that results to the inability to complete production of an amino acid “moduleactivity” that results in brain damage if untreated. WSE is due to a recessive allele. Given one WSE occurrence per 10,000 births. Which term in the Hardy-Weinberg equation corresponds to the frequency of individuals who have no alleles for the disease WSE? a. p b. 2pq c. p2 d. q2