Biology (MindTap Course List)
11th Edition
ISBN: 9781337392938
Author: Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher: Cengage Learning
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Textbook Question
Chapter 19.2, Problem 1C
INTERPRET DATA In a population at genetic equilibrium, the frequency of the homozygous recessive genotype (tt) is 0.16. What are the allele frequencies of T and t, and what are the expected frequencies of the TT and Tt genotypes?
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Consider a population of 200 individuals. For a trait expressing simple dominance,
genotype frequencies are WW = 0.1, Ww= 0.7, ww = 0.2. What are the allele
frequencies of the W and w alleles in this population (where p is the frequency of the
dominant allele).
p = 110, q = 90
p = 20, q = 80
p = 0.45, q = 0.55
p = 0.55, q = 0.45
p = 0.2, q = 0.8
p = 90, q = 110
Please refer to the Chi squared step by step document for an example to follow.
4a. A large random sample taken from a natural population of flowering plants found 300 plants with
red flowers (RR genotype), 150 with pink flowers (Rr genotype) and 38 white flowers (rr genotype). Is
the population in HWE?
Step 1 Calculate the frequencies of alleles R and r. Include the formula for calculating allele
frequencies in a population.
Ans:
Step 2 Based on the allele frequencies how many individuals are expected to a certain genotype?
Calculate by multiplying the number of individuals in population (n) x frequencies of alleles for that
genotype:
Ans:
T
Step 3 Fill in the Table Below
Genotype
Ans:
RR
Rr
rr
Observed
Expected
Obs - Exp
Step 3 Use the following formula to calculate the Chi squared value.,
Note calculate for each genotype and get the sum.
(Obs - Exp)²
Exp
³x²³ = [ (O - E)²
E
Step 4 Determine the Chi Square value for 1 Degree of Freedom and for the probability 0.05 from the
table…
An autosomal locus has alleles A and a.
The allele frequencies in a population at Hardy Weinberg equilibrium are
p = Freq(A) = 0.1
q = Freq(a) = 0.9
What is frequency of heterozygotes in this population?
Enter a single number between 0 and 1, for example 0.33
Chapter 19 Solutions
Biology (MindTap Course List)
Ch. 19.1 - Define what is meant by a populations gene pool.Ch. 19.1 - Distinguish among genotype, phenotype, and allele...Ch. 19.1 - Prob. 1CCh. 19.1 - Can the frequencies of all genotypes in a...Ch. 19.1 - INTERPRET DATA In a human population of 1000, 840...Ch. 19.2 - Discuss the significance of the HardyWeinberg...Ch. 19.2 - Prob. 4LOCh. 19.2 - INTERPRET DATA In a population at genetic...Ch. 19.2 - INTERPRET DATA In a population at genetic...Ch. 19.2 - INTERPRET DATA The genotype frequencies of a...
Ch. 19.3 - Prob. 5LOCh. 19.3 - Discuss how each of the following...Ch. 19.3 - Distinguish among stabilizing selection,...Ch. 19.3 - Which microevolutionary force leads to adaptive...Ch. 19.3 - Why is mutation important to evolution if it is...Ch. 19.3 - Which microevolutionary forces are most associated...Ch. 19.3 - Prob. 4CCh. 19.4 - Prob. 8LOCh. 19.4 - Prob. 1CCh. 19.4 - Prob. 2CCh. 19.4 - How can researchers test the hypothesis that...Ch. 19 - The genetic description of an individual is its...Ch. 19 - In a diploid species, each individual possesses...Ch. 19 - The MN blood group is of interest to population...Ch. 19 - If a populations allele and genotype frequencies...Ch. 19 - Prob. 5TYUCh. 19 - The continued presence of the allele that causes...Ch. 19 - According to the HardyWeinberg principle, (a)...Ch. 19 - Prob. 8TYUCh. 19 - Mutation (a) leads to adaptive evolutionary change...Ch. 19 - Which of the following is not true of natural...Ch. 19 - If all copies of a given locus have the same...Ch. 19 - Prob. 12TYUCh. 19 - EVOLUTION LINK Given that mutations are almost...Ch. 19 - Prob. 14TYUCh. 19 - Prob. 15TYUCh. 19 - EVOLUTION LINK Evolution is sometimes...Ch. 19 - INTERPRET DATA The recessive allele that causes...Ch. 19 - PREDICT You study males in populations of a...Ch. 19 - Prob. 19TYU
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