BIOLOGY VOL. II
16th Edition
ISBN: 9781308795317
Author: Raven
Publisher: Mcgraw-Hill/Create
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Textbook Question
Chapter 20, Problem 1A
In a population of red (dominant allele) or white flowers in Hardy–Weinberg equilibrium, the frequency or red flowers is 91%. What is the frequency of the red allele?
a. 9%
b. 30%
c. 91%
d. 70%
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Students have asked these similar questions
Assume two alleles A1 and A2 with known frequencies e.g. p (A1) = 0.7, q (A2)= 0.3
What would be the frequency of the A1A2 ?
a. 0.49
b. 0.09
c. 0.21
d. 0.42
In a Hardy-Weinberg population with two alleles, G and g, that are in equilibrium, 40% of the alleles are recessive. What percentage of the population is homozygous for the dominant allele?
a. 9%
b. 36%
c. 70%
d. 60%
e. 30%
The response to selection of flower size in a plant species is studied. Flower size is measured in the population and an average of 30.4 mm is obtained. A set of plants with average flower size of 34.13 mm are allowed to interbreed and a their offspring have a mean flower size of 32.21 mm.
What is the realized heritability?
A.
0.485
B.
0.846
C.
0.767
D.
0.979
Chapter 20 Solutions
BIOLOGY VOL. II
Ch. 20 - Assortative mating a. affects genotype frequencies...Ch. 20 - When the environment changes from year to year and...Ch. 20 - Many factors can limit the ability of natural...Ch. 20 - Stabilizing selection differs from directional...Ch. 20 - Founder effects and bottlenecks are a. expected...Ch. 20 - Relative fitness a. refers to the survival rate of...Ch. 20 - For natural selection to result in evolutionary...Ch. 20 - In a population of red (dominant allele) or white...Ch. 20 - Genetic drift and natural selection can both lead...Ch. 20 - Prob. 3A
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- If the frequency of allele 1 is 0.8 and the frequency of allele 2 is 0.2 what is the expected frequency of heterozygotes under Hardy Weinberg? Group of answer choices A. 0.32 B. 0.8 C. 0.2 D. 0.16arrow_forwardA gene exists in two alleles designated D and d. If 48 copies of this gene are the D allele and 152 are the d allele, what is the allele frequency of D? a. 0.24 c. 0.38 b. 0.32 d. 0.76arrow_forwardIn a population 25 individuals that recently emigrated from a mainland population to form a new population on an unpopulated island the frequency of the dominant allele is 0.64. What is the probability of fixation in the next generation? a. 100% b. 36% c. 64% d. 75%arrow_forward
- The allele frequency of C is 0.4 and c is 0.6. If the population is in Hardy-Weinberg equilibrium, what is the frequency of heterozygotes? a. 0.16 c. 0.26 b. 0.24 d. 0.48arrow_forwardA population in Hardy Weinberg Equilibrium has 300 individuals and 25% of these are recessive. What is the frequency of p? a. .75 b. 75 c. .5 d. .25arrow_forwardA very large population of randomly-mating laboratory mice contains 35% white mice. White coloring is caused by the recessive genotype, "aa". Calculate the frequency of the homozygous dominant genotype (AA). * a. 5.9 % b. 17% c. 35% d. 41% e. 48% f. 59% g. 65% h. none of the choices A very large population of randomly-mating laboratory mice contains 35% white mice. White coloring is caused by the recessive genotype, "aa". Calculate the frequency of the dominant trait.* a. 5.9 % b. 17% c. 35% d. 41% e. 48% f. 59% g. 65% h. none of the choicesarrow_forward
- A meadow is home to a population of plants of a particular species. Among these individuals are 125 plants that have red flowers and 375 plants that have white flowers. The allele of the flower color gene that produces red flowers (R) is completely dominant over the white flower color allele (r). Approximately what percent of the plants in the meadow would be expected to have the Rr genotype? Group of answer choices a. 23% b. 33% c. 2% d. 76%arrow_forwardA population of mice contains 20 animals Show work here: with white tails and 30 animals with grey tails. Grey tails are the dominant trait. a. What is the frequency of the white allele? b. What is the frequency of the grey allele? c. What is the frequency of heterozygotes? d. What is the frequency of mice homozygous for the grey allele?arrow_forwardThe mean number of offspring produced by each of three genotypes is shown below. 10 MM 30 MN 50 NN What is the selection coefficient for the genotype NN? a. 0.2 b. 0 c. 1 d. 0.5arrow_forward
- A population has a frequency of p = .4 and q= .6. You were told that in this population p2+2pq+q2= 1. Is the population in HW equilibrium? a. No because the HW equation is not true b. lettuce c. Yes because the HW equation is true d. There is not enough information since we do not know whether p2= the frequency of the homozygous dominant, q2 the frequency of the homozygous recessive and 2pq the frequency of the heterozygotearrow_forwardYou are surveying population genetics of snails while studying abroad in New Zealand. At your locus of interest, you have AA: 32 Aa:46 aa: 22. Identify the statement that accurately describes this population. a. The genotype frequency of AA is 0.77. b. The frequency of the A allele is 0.45. c. The genotype frequency of the heterozygotes is 0.45. d. The frequency of the a allele is 0.23.arrow_forwardA population of birds may have red feathers or orange feathers. Red feathered birds have the genotype RR or Rr. Orange feathered birds have the genotype rr. The frequency of the RR genotype is .46 a. What is the frequency of heterozygous birds? B. What is the frequency of the R allele ? C. What is the frequency of r allele?arrow_forward
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