Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Chapter 23, Problem 9TYK
Summary Introduction
Introduction: In 1908, G. H. Hardy and Wilhelm Weinberg evaluated the basic principle of population genetics. At equilibrium, the
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You are surveying population genetics of snails while studying abroad in New Zealand. At your locus of interest, you have AA: 32 Aa:46 aa: 22. Identify the statement that accurately describes this population.
a.
The genotype frequency of AA is 0.77.
b.
The frequency of the A allele is 0.45.
c.
The genotype frequency of the heterozygotes is 0.45.
d.
The frequency of the a allele is 0.23.
In a population of red (dominant allele) or white flowers in Hardy–Weinberg equilibrium, the frequency of red flowers is 91%. What is the frequency of the red allele?
a. 9%
b. 30%
c. 91%
d. 70%
In achondroplastic dwarfism, an autosomal dominant disease, the gene is lethal in homozygotes. If the frequency of the normal allele is 0.99, what is the heterozygote frequency?
a. 0.01
b. 0.02
c. 0.98
d. 0.99
An autosomal recessive gene is lethal in homozygotes. In a population at Hardy- Weinberg equilibrium, how many generations will it take to eliminate the gene from the population
a.100
b.It will not be eliminated from the population.
c.1
d.25
Chapter 23 Solutions
Study Guide for Campbell Biology
Ch. 23 - a. What is a major source of genetic variation for...Ch. 23 - In a population of 200 mice, 98 are homozygous...Ch. 23 - Use the allele frequencies you determined in...Ch. 23 - Practice using the Hardy-Weinberg equation so that...Ch. 23 - Prob. 5IQCh. 23 - Why hasnt the highly deleterious sickle-cell...Ch. 23 - a. What is Hardy-Weinberg equilibrium? b. Define...Ch. 23 - Prob. 2SYKCh. 23 - Prob. 1TYKCh. 23 - Prob. 2TYK
Ch. 23 - Prob. 3TYKCh. 23 - Prob. 4TYKCh. 23 - Mice have an estimated 1,000 olfactory receptor...Ch. 23 - Prob. 6TYKCh. 23 - If a population has the following genotype...Ch. 23 - In a population with two alleles, B and b, the...Ch. 23 - Prob. 9TYKCh. 23 - Prob. 10TYKCh. 23 - In a random sample of a population of shorthorn...Ch. 23 - Genetic drift is likely to be seen in a population...Ch. 23 - Porphyria variegata is a genetic disease...Ch. 23 - Cystic fibrosis is a very serious genetic disorder...Ch. 23 - Prob. 15TYKCh. 23 - Prob. 16TYKCh. 23 - Prob. 17TYKCh. 23 - Prob. 18TYKCh. 23 - Prob. 19TYKCh. 23 - Prob. 20TYKCh. 23 - Prob. 21TYK
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- A hypothetical population was found to have a genotype frequency of AA=20%, Aa=40%, aa=40%. What genotype is in short supply (that is, in less proportions than equilibrium levels)? a. Aa b. AA C. aa d. none of the abovearrow_forwardIn a population of 1000 mice, the allele frequency for dominant brown fur is 0.25. The population is in Hardy-Weinberg equilibrium. How many individuals will be heterozygous in the population? A. 375 B. 625 C. 750 D. 500arrow_forwardA gene exists in two alleles designated D and d. If 48 copies of this gene are the D allele and 152 are the d allele, what is the allele frequency of D? a. 0.24 c. 0.38 b. 0.32 d. 0.76arrow_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_forwardThere is a population of cats and 16% of the cats this population show a recessive trait. a. What is the frequency of the recessive allele? b. What is the frequency of the dominant genotype? c. What is the frequency of cats with the heterozygous genotype?arrow_forwardWhat is the percentage of people with light eyes in the population were the concentration of the allele which determines the dark eye color is 0,6? Select one: a. 16 % b. 24 % c. 36 % d. 48 % e. 84 %arrow_forward
- In horses, tobiano is a white spotting pattern. The tobiano allele (T) is dominant over the non-tobiano (t) allele. In an ideal horse population exhibiting Hardy–Weinberg equilibrium, 350 horses out of 465 are non-tobiano. a. Calculate the number of homozygous dominant tobiano horses. Answer b. Calculate the number of heterozygous horses. Answer c. Calculate the number of tobiano horses in the population. Answer Express your answer rounded to the nearest whole number.arrow_forwardSuppose 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? A. 0.9025 B. 0.0025 C. 0.05 D. 0.095 E. 0.0475arrow_forwardIf 60 percent of the loci in a gene pool are dominant for the hair color trait H, and 40 percent are recessive (h), then according to Hardy-Weinberg theory, what percentage of the individuals in the population will be recessive for this trait (hh)? A. 16 B. 40 C. 36 D. 24arrow_forward
- The dominant allele of the gene determines dark, the recessive - light color of human eyes. The concentration of this dominant gene allele in a certain human population is 0.6. The percent of people with dark eyes in this population is the following: Select one: a. 100 % O b. 90 % c. 84 % d. 64 % e. 8%arrow_forwardIn a group of patients, it is reported that drug p is effective only in individuals of the recessive phenotype. if q = .6 and p to .4 what fraction of patients would benefit from the treatment. Assume that the population is in HW equilibrium? a. .25 b. .36 c. .4 d. .6arrow_forwardIssues with inbreeding often occurs with dog breeds, such as German shepherds. How can we the best describe inbreeding? a. successive breeding with individuals from a variety of populations b. successive breeding within individuals from within one population c. breeding between different breeds to produce new breeds d. breeding the same set parents more than oncearrow_forward
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