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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Textbook Question
Chapter 23, Problem 1SYK
- a. What is Hardy-Weinberg equilibrium?
- b. Define the variables of the equation for Hardy-Weinberg equilibrium. Make sure you can use this equation to determine allele frequencies and predict genotype frequencies.
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Consider the Hardy-Weinberg equations. If the frequency of a recessive allele is 0.3, what is the frequency of the dominant allele?
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The frequency of the A allele is represented by p, while the a allele is represented by q. At hardy-weinburg equilibrium, what is the frequency of the Aa genotype?
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
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- ****Note for question 1 - you have been given the frequency of the two alleles (dominant and recessive = p + q=1) and you are using those allele frequencies to calculate the genotype frequencies. p2 + 2pq + p2arrow_forwardWhat are some general tips in calculating allele and genotype frequencies? Examples of each will be useful.arrow_forwardd) Please refer to the table. If only data on the variances for F1, F2 and BC1 populations were available, how will the broad sense heritability estimate change? Show solutions.arrow_forward
- What is the expected frequency of Gg while in Hardy-Weinberg Equilibrium if you have an allele frequency of G = 0.1 and g = 0.9 in a two allele system?arrow_forwardIN a Hardy-Weinberg equilibrium, as the frequencies of homozygous genotypes increase, the frequency of the heterozygous genotype _____arrow_forwardConsider 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_forward
- In 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_forwardWhat is the frequency of the B allele if allele b has a frequency of 0.24 and what are the three genotype frequencies?arrow_forwardUsing the observed counts for each genotype, how do you find the expected values with those numbers and the frequencies?arrow_forward
- Cystic fibrosis (CF) is a recessive autosomal disorder. In certain populations of Northern European descent, the number of people born with this disorder is about 1 in 2500. Assuming Hardy- Weinberg equilibrium for this trait: A. What are the frequencies for the normal and CF alleles? B. What are the genotype frequencies of homozygous normal, heterozygous, and homozygous affected individuals? C. Assuming random mating, what is the probability that two phenotypically unaffected heterozygous carriers will choose each other as mates?arrow_forwardConsider a locus with two alleles, A and a. If the frequency of AA is 0.30, what is the frequency of A under Hardy-Weinberg?arrow_forwardIf a trait determined by autosomal recessive allele occurs at a frequency of 0.25 in a population, what are the allelic frequencies? Assume Hardy-Weinberg equilibrium and use A and a to symbolize the dominant and recessive alleles, respectively. Show calculation.arrow_forward
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