Campbell Biology: Concepts & Connections (8th Edition)
8th Edition
ISBN: 9780321885326
Author: Jane B. Reece, Martha R. Taylor, Eric J. Simon, Jean L. Dickey, Kelly A. Hogan
Publisher: PEARSON
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Textbook Question
Chapter 13, Problem 7TYK
In a population with two alleles, B and b, the allele frequency of b is 0.4. B is dominant to b. What is the frequency of individuals with the dominant
a. 0.16
b. 0.36
c. 0.48
d. 0.84
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In a population that is in Hardy-Weinberg equilibrium, there are two possible alleles for a certain gene, A and a. If the frequency of allele A is 0.4, what fraction of the population is heterozygous?
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Suppose that in a population the frequency of a particular recessive condition is 1/400. Assume this is locus with two alleles (A and a) in the population and that the population is at Hardy–Weinberg equilibrium. What is the frequency of the carriers of this condition in the population?
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Chapter 13 Solutions
Campbell Biology: Concepts & Connections (8th Edition)
Ch. 13 - Summarize the key points of Darwins theory of...Ch. 13 - Complete this concept map describing potential...Ch. 13 - Which of the following did not influence Darwin as...Ch. 13 - Natural selection is sometimes described as...Ch. 13 - In an area of erratic rainfall, a biologist found...Ch. 13 - If an allele is recessive and lethal in...Ch. 13 - In a population with two alleles, B and b, the...Ch. 13 - Within a few weeks of treatment with the drug 3TC,...Ch. 13 - Prob. 9TYKCh. 13 - Write a paragraph briefly describing the kinds of...
Ch. 13 - In the early 1800s, French naturalist Jean...Ch. 13 - Sickle-cell disease is caused by a recessive...Ch. 13 - It seems logical that natural selection would work...Ch. 13 - SCIENTIFIC THINKING Cetaceans are fully aquatic...Ch. 13 - A population of snails is preyed on by birds that...Ch. 13 - Advocates of scientific creationism and...
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- If the frequency of allele 1 is 0.8 and the frequency of allele 2 is 0.2 what is the expected frequency of heterozygotes under Hardy Weinberg? Group of answer choices A. 0.32 B. 0.8 C. 0.2 D. 0.16arrow_forwardYou have a population of 100 individuals in HW equilibrium and there are two alleles at the T locus (T and t). If there are 36 individuals in the population with genotype tt, what is the expected frequency of the t allele under HW? Group of answer choices A. 0.36 B. 0.18 C. 0.5 D. 0.6 E. 0.72arrow_forwardA population of cats is in Hardy Weinberg equilibrium for the S locus which causes patches of white fur. There are two alleles S and s. The frequency of the S allele is 0.3 and the frequency of the s allele is 0.7. What is the expected frequency of Ss cats in the population? Group of answer choices A. 0.21 B. 0.7 C. 1.0 D. 0.3 E. 0.42arrow_forward
- If a population has 25 individuals with genotype AA, 20 with genotype Aa, and 5 with genotype aa, what is the allele frequency of a? Group of answer choices a. 0.4 b. 0.3 c. 0.2 d. 0.1 e.0.5arrow_forwardA. Population 1 is in Hardy-Weinberg equilibrium; the frequency of allele A is 0.5. B. Two of the populations are not in Hardy-Weinberg equilibrium.arrow_forwardA population is in Hardy Weinberg Equilibrium. The frequency of A is 0.6 and the frequency of a is 0.4. What is the expected frequency of AA individuals in the population? Group of answer choices a. 0.6 b. 0.24 c. 0.36 d. 0.16 e. 0.48arrow_forward
- In a population 25 individuals that recently emigrated from a mainland population to form a new population on an unpopulated island the frequency of the dominant allele is 0.64. What is the probability of fixation in the next generation? a. 100% b. 36% c. 64% d. 75%arrow_forwardIn a hypothetical species of mice, the shaggy gene determines hair length. S is the dominant allele and confers the short hair phenotype. Homozygous ss individuals have long hair. There are 422 long-haired mice and 278 short-haired mice in the population. What is the frequency of the SS genotype? a. 0.60 b. 0.05 c. 0.40 d. 0.22arrow_forwardAbout 70 percent of all Caucasians can taste the chemical phenylthiocarbamide, and the remainder cannot. The ability to taste this chemical is determined by the dominant allele T, and the inability to taste is determined by the recessive allele t. If the population is assumed to be in Hardy-Weinberg equilibrium, what is the heterozygotes frequency in this population? a. 0.7 b. 0.4 c. 0.2 d. 0.5arrow_forward
- In a population of frogs, the analysis of Locus A showed the following number: Number of individuals Genotype 96 A1/A1 65 A2/A2 53 A1/A2 What is the frequency of A1 allele in the population? A. 0.38 B. 0.4 C. 0.28 D. 1.19 E. 0.6arrow_forwardIf a population has10 individuals with genotype AA, 20 with genotype Aa and 70 with genotype aa, what is the frequency of the a allele in the population? Group of answer choices A. 0.75 B. 0.90 C. 0.14 D. 0.70 E. 0.80arrow_forwardAssume you have a population with alleles A and a at a genetic locus. You measured the population and found 30 AA homozygotes, 100 Aa heterozygotes, and 70 aa homozygotes. What is the frequency of A and a in the population? a. A = 0.3; a = 0.7 b. A = 0.7; a = 0.3 c. A = 0.4; a = 0.6 d. A = 0.6; a = 0.4arrow_forward
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