Campbell Essential Biology (7th Edition)
7th Edition
ISBN: 9780134765037
Author: Eric J. Simon, Jean L. Dickey, Jane B. Reece
Publisher: PEARSON
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Chapter 13, Problem 4SQ
In a population with two alleles for a particular genetic locus, B and b, the allele frequency of B is 0.7. If this population is in Hardy-Weinberg equilibrium, what is the frequency of heterozygotes? What is the frequency of homozygous dominants? What is the frequency of homozygous recessives?
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Chapter 13 Solutions
Campbell Essential Biology (7th Edition)
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- Consider a population in which the D locus has two alleles, D and d, with f(D) = 0.6 and f(d) = 0.4. What are the genotypic frequencies expected under Hardy-Weinberg equilibrium?arrow_forwardIn corn, kernel color is governed by a dominant allele for white color (W) and by a recessive allele for yellow (w). A random sample of 152 kernels from a population that is in Hardy- Weinberg equilibrium reveals that 35 kernels are yellow and 117 kernels are white. What is the frequency of individuals with the homozygous dominant genotype?arrow_forwardThe frequency of the dominant allele “A” in an imaginary population is 0.20 (p) and the frequency of the recessive allele “a” in the population is 0.80 (q). What are the PREDICTED/EXPECTED genotype frequencies of all three genotypes (homozygous dominant, heterozygous, and homozygous recessive) if the population is in Hardy-Weinberg equilibrium?arrow_forward
- In a population at Hardy-Weinberg equilibrium, the frequency of the homozygote recessive is 0.16. What is the frequency of the heterozygote?arrow_forwardFor a gene existing in two alleles, what are the allele frequencies when the heterozygote frequency is at its maximum value, assuming Hardy-Weinberg equilibrium? What if there are three alleles?arrow_forwardThe spring beauty flower is found in two colors, pink and white. These colors are determined by two alleles at a single locus, where white is dominant over pink. Consider a population in which 34 % of individuals are pink. If the color locus is in Hardy–Weinberg equilibrium, what percentage of individuals are expected to be heterozygotes? Round to the closest full number.arrow_forward
- at what allelic frequency is the heterozygous genotype twice as frequent as the homozygous genotype in a population when in Hardy-Weinberg equilibrium?arrow_forwardConsider an autosomal locus with alleles A and a. If the the allele frequencies are as follows Freq(A) = 0.4, Freq(a) = 0.6. , then what is the predicted frequency of heterozygous Aa individuals, assuming the population is in Hardy-Weinberg equilibrium? Freq(Aa) = ? Enter a number between 0 and 1, inclusive, for example 0.33arrow_forwardIn a population of cats, the phenotypic frequency of black cats is 91%, and the phenotypic frequency of white cats is 9%. Assuming that black (B) is dominant and white (b) is recessive, identify the appropriate frequency for each of the following for a population in Hardy-Weinberg equilibrium. Match each frequency with the correct value. Allele Frequency of b Allele frequency of B genotype frequency of BB Genotype frequency of Bbarrow_forward
- A rabbit warren has 300 individuals. The coat colour of rabbits is expressed through incomplete dominance. The coat colour can be dark brown, light brown, or white.There are 81 dark brown rabbits, 150 light brown rabbits, and 69 white rabbits. Assume that all of the conditions are met for a population in Hardy–Weinberg equilibrium.What is the light brown genotype frequency, the white phenotype frequency, and the dark brown allele frequency? Select one: a. Genotype of Light Brown Rabbits Phenotype of White Rabbits Dark Brown Allele Frequency 0.27 0.48 0.52 b. Genotype of Light Brown Rabbits Phenotype of White Rabbits Dark Brown Allele Frequency 0.50 0.23 0.52 c. Genotype of Light Brown Rabbits Phenotype of White Rabbits Dark Brown Allele Frequency 0.27 0.23 0.77 d. Genotype of Light Brown Rabbits Phenotype of White Rabbits Dark Brown Allele Frequency 0.50 0.48 0.77arrow_forwardIn a population at genetic equilibrium, the frequency of the dominant phenotype is 0.96. What are the frequencies of the dominant (A) and recessive (a) alleles, and what are the expected frequencies of the AA, Aa, and aa genotypes?arrow_forwardIn a population at Hardy-Weinberg equilibrium, 190 out of 1000 individuals have polydactyly. Note that the trait is dominant. a. What is the frequency of the dominant and recessive alleles? b. How many are expected to be heterozygotes for the trait? c. How many are expected to be homozygous dominant?arrow_forward
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