1 in 150 Americans have a rare, recessive, autosomal disorder. People with this disorder have a fitness of 0.2 a. What is p? b. What is q? c. What is q after a generation of natural selection? d. What is p after a generation of natural selection? e. What is q at equilibrium? f. What is the frequency of healthy people at equilibrium?

1 in 150 Americans have a rare, recessive, autosomal disorder. People with this disorder have a fitness of 0.2 a. What is p? b. What is q? c. What is q after a generation of natural selection? d. What is p after a generation of natural selection? e. What is q at equilibrium? f. What is the frequency of healthy people at equilibrium?

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter19: Population Genetics And Human Evolution

Section: Chapter Questions

Problem 2QP: How Can We Measure Allele Frequencies in Populations? The MN blood group is a single-gene,...

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The MN blood group is of interest to population geneticists because (a) people with genotype MN cannot receive blood transfusions from either MM or NN people (b) the MM, MN, and NN genotype frequencies can be observed directly and compared with calculated expected frequencies (c) the M allele is dominant to the N allele (d) people with the MN genotype exhibit frequency-dependent selection (e) people with the MN genotype exhibit heterozygote advantage
How Can We Measure Allele Frequencies in Populations? The MN blood group is a single-gene, two-allele system in which each allele is codominant. Why are such codominant alleles ideal for studies of allele frequencies in a population?
1. Certain flowers are either red (dominant) or white (rr). 91% of the flowers are red. Using the equations, calculate the frequency of the R allele. First you replace R and r for p and q. Thus we know that q2 = .09, because only the homozygous recessives will be white. *changed away from percentages to work the math more easily* What is the frequency of the R allele in this population? 2. In a coastal city in Nigeria, the incidence of Sickle-Cell disease is 4% of the population. Based on this information, what is the frequency of this allele in the population of that city? 3. In a given human population, only the "A" and "B" alleles are present in the ABO system; there are no individuals with type "O" blood or with O alleles in this particular population. If 200 people have type A blood, 75 have type AB blood, and 25 have type B blood, what are the alleleic frequencies of this population (i.e., what are p and q)? 4. An allele W, for white wool, is dominant over allele w, for…
The relative fitnesses of A,A1. A,Az and A2A2 are 0.5. 0.8, and 1 respectively. What is the expected result of natural selection in this situation? A, will increase and A2will decrease. O A2 will increase and A, will decrease. Both alleles will decrease in frequency. A stable equilibrium will be achieved in which both alleles are maintained. An unstable equilibrium will exist and the outcome depends on the allele frequencies.
Lets say there exists a gene in the United States that comes in two alleles, the dominant A and the recessive a. The allele frequency of the dominant allele is 60% and the allele frequency of the recessive allele is 40% The population in genotyped and its found in the United States there are 36% Homozygous Dominant folk, 48% Homozygous Recessive folk, and 16% Homozygous recessive folk. Do you think there is any fitness advantage to any of these genotypes? Why or why not? View keyboard shortcuts
In corn, kernel color is governed by a dominant allele for white color (A) and by a recessive allele for yellow (a). A random sample of 152 kernels from a population that assumes Hardy- Weinberg principle reveals that 117 kernels are white. What is the frequency of individuals with the homozygous recessive genotype? O 0.27 O 0.56 O 0.23 O 0.26 O O o O
1. What happened to observed allele frequencies in each population? (only answer this question number 1, below is a data) Data: a. observed frequency of alleles of F1 population without natural selection: A=0.43 a=0.57 b.observed frequency of alleles of F2 population without natural selection: A=0.52 a=0.48 c. observed frequency of alleles of F1 population with natural selection: A=0.69 a=0.31 d. observed frequency of alleles of F2 population with natural selection: A=0.62 a=0.38
Sickle cell anemia is a recessive blood disorder that affects the shape of red blood cells and the ability of blood to carry oxygen. In a certain region of West Africa, 9 out of every 100 children are born with sickle cell anemia. What is the frequency of individuals in this population who do not carry the recessive allele for this disorder? Assume population is in Hardy-Weinberg Equilibrium. 0.91 O 2 x 0.91 x 0.09 О 2x 0.7х0.3 0.91 x 0.09 0.7 x 0.7
1. In a population at Hardy-Weinberg equilibrium, 190 out of 1000 individuals have polydactyly. Note that the trait is dominant. (6 pts) a. What is the frequency of the dominant and recessive alleles? b. How many individuals in the population are expected to be heterozygotes? c. How many individuals in the population are expected to be homozygous dominant?
Consider a sample of 100 individuals sampled from a population in Hardy-Weinberg equilibrium that are genotyped at a single locus. Of these 100 individuals, 25 individuals are A¡A1, 45 are A1A2, and 30 are A2A2. What is the actual (observed) allele frequency of the A1 allele in this sample? (you may use a calculator if needed) O A. 0.325 O B. 0.275 O C. 0.475 O D. 0.525
1. 9. You are a genetiCıst studying a population of 100 barn swallows. You are particularly interested in one gene, and upon examining the alleles present, you find one allele is quite common, accounting for 80 of the alleles in this population. What is the frequency of this allele in the population? 4. 5. The ability to breathe fire in dragons is controlled by a single gene with two alleles. The fire-breathing allele (F) is dominant to the non-fire breathing allele (f). In a population of 600 dragons, 150 dragons are non-fire breathing (ff) and the rest can breathe fire (either FF or Ff) The population is in Hardy-Weinberg equilibrium. The frequency of the dominant allele (F) is represented by "p and the frequency of the recessive allele (f) is represented by "q". Recall the allele frequency is p+ q = 1 and the Hardy-Weinburg equation is p2 + 2pq + q2 = 1 (2 pts). What is the frequency of the recessive allele (f)? Hint: you can figure out the frequency of ff, which is equal to q2, but…
A/A and A/a individuals are equally fertile. If 0.1 percent of the population is a /a, what selection pressureexists against a /a if the A → a mutation rate is 10−5 ?Assume that the frequencies of the alleles are at theirequilibrium values.