Genetic Analysis: An Integrated Approach (3rd Edition)
3rd Edition
ISBN: 9780134605173
Author: Mark F. Sanders, John L. Bowman
Publisher: PEARSON
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Chapter 20, Problem 28P
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Imagine that in squirrels, the gene for brown coat is coded by two alleles, D for dark brown and d for light brown. In a population of squirrels in Central Park, you identified 251 DD, 182 Dd , and 117 dd. What is the frequency of the light brown, d allele? Please use and round to four decimal points.
If 60 individuals have the genotype AA and there are 100 total individuals in the population what is the frequency of AA?
In a population 49% are homozygous with genotype tt, find out the gene frequency of alleles T and t.
Chapter 20 Solutions
Genetic Analysis: An Integrated Approach (3rd Edition)
Ch. 20 - 20.1 Compare and contrast the terms in each of the...Ch. 20 - In a population, what is the consequence of...Ch. 20 - 20.3 Identify and describe the evolutionary forces...Ch. 20 - Describe how natural selection can produce...Ch. 20 - Thinking creatively about evolutionary mechanisms,...Ch. 20 - 20.6 Genetic drift, an evolutionary process...Ch. 20 - Over the course of many generations in a small...Ch. 20 - Catastrophic events such as loss of habitat,...Ch. 20 - 20.9 George Udny Yule was wrong in suggesting that...Ch. 20 - 20.10 The ability to taste the bitter compound...
Ch. 20 - Figure 20.6 illustrates the effect of an ethanol ...Ch. 20 - 20.12 Biologists have proposed that the use of...Ch. 20 - 20.13 Two populations of deer, one of them large...Ch. 20 - 20.14 Directional selection presents an apparent...Ch. 20 - 20.15 What is inbreeding depression? Why is...Ch. 20 - 20.16 Certain animal species, such as the...Ch. 20 - Genetic Analysis 20.1 predicts the number of...Ch. 20 - 20.18 In a population of rabbits, and . The...Ch. 20 - Sickle cell disease (SCD) is found in numerous...Ch. 20 - 20.20 Epidemiologic data on the population in the...Ch. 20 - The frequency of tasters and nontasters of PTC...Ch. 20 - Tay-Sachs disease is an autosomal recessive...Ch. 20 - 20.23 Cystic fibrosis (CF) is the most common...Ch. 20 - 20.24 In the mouse, Mus musculus, survival in...Ch. 20 - 20.25 In a population of flowers growing in a...Ch. 20 - Assume that the flower population described in the...Ch. 20 - 20.27 ABO blood type is examined in a Taiwanese...Ch. 20 - 20.28 A total ofmembers of a Central American...Ch. 20 - 20.29 A sample offield mice contains individuals...Ch. 20 - Prob. 30PCh. 20 - Albinism, an autosomal recessive trait...Ch. 20 - 20.32 The frequency of an autosomal recessive...Ch. 20 - 20.33 Evaluate the following pedigree, and answer...Ch. 20 - Evaluate the following pedigree, and answer the...Ch. 20 - The following is a partial pedigree of the British...Ch. 20 - Draw a separate hypothetical pedigree identifying...Ch. 20 - Prob. 37PCh. 20 - 20.38 Achromatopsia is a rare autosomal recessive...Ch. 20 - 20.39 New allopolyploid plant species can arise by...
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- Consider a population with 28 individuals with the genotype AA and 12 Aa individuals and 50 individuals with the genotype aa how many alleles in this population in total?arrow_forwardThe following table shows the number of dogs for certain tail lengths in a population of dogs. Tail Length Number of Dogs very short (less than 1 inch) 2 short (1–5 inches) 5 medium (5–10 inches) 15 long (10–15 inches) 5 very long (15–25 inches) 2 Based on this data, what type of trait is tail length in dogsarrow_forwardGiven a population of 100 individuals where 15 are AA, 25 are Aa, and 60 are aa, what is the frequency of allele "A"and the frequency of allele "a"arrow_forward
- Imagine the following population with the genotype: AA= 15 Aa= 10 aa= 25 What are the OBSERVED genotypic frequencies? (To do this determine the total number of individuals in the population (50) and make a fraction for each genotype.) AA= Aa= aa=arrow_forwardA population of mice in Northern Iowa has two alleles for coat color, B and b. The population has 980 BB, 840 Bb, and 180 bb individuals. What are the genotype frequencies in this population?arrow_forwardIn a population of 527 individuals, a locus has two alleles: T and t. If 148 individuals have the tt genotype, and the locus is at Hardy-Weinberg equilibrium, what is the frequency of the TT genotype? Round your answer to the second decimal place.arrow_forward
- The following are the observed ABO blood group phenotypes among a group of Canadian Indians: O A B AB , 288 280 19 13 , respectively. Compute for the gene frequencies.arrow_forwardThe following frequencies were gathered in an African population affected with sickle-cell anemia: SS, 75.5%; Ss, 23.0%; ss, 1.5% (S = normal hemoglobin allele; s = mutant hemoglobin allele). Calculate the genotypic frequencies and determine whether this data represent a population that is in HWE.arrow_forwardIn a human population, the genotype frequencies at a locus with three alleles are as follows: 0.3 A1A1, 0.2 A2A2, 0.1 A3A3, 0.2 A1A2, 0.1 A1A3, and 0.1 A2A3. The frequency of the A3 allele is: asaparrow_forward
- IN a Hardy-Weinberg equilibrium, as the frequencies of homozygous genotypes increase, the frequency of the heterozygous genotype _____arrow_forwardYou sample a population of 189 mule deer for ear length alleles and find that 32% have AA, 42% have AB, and 26% have BB. If the HWE expected frequencies are AA=28%, AB=50%, and BB=22%, is this locus in HWE?arrow_forwardA population of dragons or Varanus dragonus has two alleles B and P encoding for phenotypes blue and purple scales, is dominant over B. You have population of 345 individuals. PP = 100, BP; =90 , and BB = 155 . What is the frequency of the P allele? Please use and round to four decimal points.arrow_forward
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