Concepts of Genetics Plus Mastering Genetics with Pearson eText -- Access Card Package (12th Edition) (What's New in Genetics)
12th Edition
ISBN: 9780134811390
Author: William S. Klug, Michael R. Cummings, Charlotte A. Spencer, Michael A. Palladino, Darrell Killian
Publisher: PEARSON
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Chapter 26, Problem 12PDQ
Under what circumstances might a lethal dominant allele persist in a population?
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Under what circumstances might a lethal dominant allele persistin a population?
Why do recessive lethals persist in a population? Provide an example of a recessive lethal allele.
How is it possible that a lethal recessive gene can be maintained in a population? Give an example.
Chapter 26 Solutions
Concepts of Genetics Plus Mastering Genetics with Pearson eText -- Access Card Package (12th Edition) (What's New in Genetics)
Ch. 26 - The ability to taste the compound...Ch. 26 - Determine whether the following two sets of data...Ch. 26 - If the albino phenotype occurs in 1/10,000...Ch. 26 - A prospective groom, who is unaffected, has a...Ch. 26 - In a region of Quebec, Canada, 1 in 22 people are...Ch. 26 - Critics argue that a uniform panel of disorders...Ch. 26 - Others argue that the current testing system...Ch. 26 - HOW DO WE KNOW? Population geneticists study...Ch. 26 - CONCEPT QUESTION Read the Chapter Concepts list on...Ch. 26 - Price et al. [(1999).J. Bacteriol181:2358-2362)...
Ch. 26 - The genetic difference between two Drosophila...Ch. 26 - The use of nucleotide sequence data to measure...Ch. 26 - Prob. 6PDQCh. 26 - What must be assumed in order to validate the...Ch. 26 - In a population where only the total number of...Ch. 26 - If 4 percent of a population in equilibrium...Ch. 26 - Consider a population in which the frequency of...Ch. 26 - If the initial allele frequencies are p = 0.5 and...Ch. 26 - Under what circumstances might a lethal dominant...Ch. 26 - Assume that a recessive autosomal disorder occurs...Ch. 26 - One of the first Mendelian traits identified in...Ch. 26 - Describe how populations with substantial genetic...Ch. 26 - Achondroplasia is a dominant trait that causes a...Ch. 26 - Prob. 17PDQCh. 26 - Prob. 18PDQCh. 26 - A botanist studying water lilies in an isolated...Ch. 26 - A farmer plants transgenic Bt corn that is...Ch. 26 - In an isolated population of 50 desert bighorn...Ch. 26 - To increase genetic diversity in the bighorn sheep...Ch. 26 - What genetic changes take place during speciation?Ch. 26 - Some critics have warned that the use of gene...Ch. 26 - Prob. 25PDQCh. 26 - What are the two groups of reproductive isolating...Ch. 26 - A form of dwarfism known as Ellisvan Creveld...Ch. 26 - The original source of new alleles, upon which...Ch. 26 - A number of comparisons of nucleotide sequences...Ch. 26 - Shown below are two homologous lengths of the...Ch. 26 - Recent reconstructions of evolutionary history are...
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- How is it possible that there are multiple different alleles in a population and yet any individual can have only two alleles?arrow_forwardThe agouti gene determines coat colour in mice. Heterozygous mice have yellow coats, while homozygous dominant mice have black coats. However, having two copies of the recessive alleles is lethal. In a population of 2 000 mice, 1 082 mice have black coats. a) Calculate the frequency of each allele. Show all your work and express your answer as a value between 0 and 1 rounded to two decimal places. b) What percentage of the mouse population is expected to be carriers of the lethal allele? Show all your work and express your answer rounded to one decimal place. c) How many mice will die during fetal development? Show all your work and round your answer to the closest whole number.arrow_forwardIn 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_forward
- If a particular population of diploid individuals is in equilibrium and contains 16% homozygous dominant individuals, 48% heterozygotes, and 36% homozygous recessive individuals, what is the frequency of the recessive allele in this population?arrow_forwardThe allele for long whiskers in mice is dominant over the allele for a short whiskers. In a population of 500 individuals, 25% show the recessive phenotype. How many mice would you expect to be homozygous dominant and heterozygous for the trait?arrow_forwardIn a randomly mating population of mice, 3 out of 200 mice are anemic. Anemia is a recessive condition where the affected mice do not have enough red blood cells to carry the required oxygen molecules to the tissues. What is the expected frequency of the homozygous dominant genotype for anemia in this population?arrow_forward
- See attached imagearrow_forwardIn fruit flies, yellow body is a sex linked recessive allele. The dominant allele is dark bodied. If a female with a yellow body mates with a male with a dark body, then what percent of the female offspring will be yellow? O O O O a) 0 b) 25 c) 50 d) 75 e) 100arrow_forwardIn fruit flies, yellow body is a sex linked recessive allele. The dominant allele is dark bodied. If a female with a yellow body mates with a male with a dark body, then what percent of the female offspring will be yellow? O O O O a) 0 b) 25 c) 50 d) 75 e) 100arrow_forward
- Select all true statements about dominate alleles. A) Dominant alleles are stronger than recessive alleles B) Dominant alleles are always the most common allele in a population C) Dominant alleles can be hidden D) Dominant alleles code for functioning proteins E) Dominant alleles can mask the presence of a recessive allelearrow_forwarda population has 700 individuals, 85 of genotype AA, 320of genotype Aa, and 295 of genotype aa. What are thefrequencies of alleles A and a?arrow_forwardThe color of the coat of a hypothetical breed of cattle is controlled codominantly by a gene in locus R. A routine inspection of a randomly mating population with 353 animals showed that 13% of them are red , 45% are roan and 42% are white. question: how many animals have the recessive allele?arrow_forward
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