Question 1

Is the buildup of reproductive barriers in two allopatric populations the result of natural selection for reproductive isolation?

Accepted Answer

No.Selection has no means of acting beca...

Question 2

_____ ultimately produces all new genetic variation in a population.

Accepted Answer

A)  Outcrossing
B)  Migration
C)  Evolution
D)  Mutation
E)  EquilibriumF) A) and E)
G) All of the above

Question 3

_____ is the movement of genes between populations.

Accepted Answer

A)  Evolution
B)  Migration
C)  Positive assortative mating
D)  Outcrossing
E)  Genetic driftF) C) and D)
G) C) and E)

Question 4

The _____ approach to inferring relationships among species selects the phylogeny that minimizes the number of evolutionary changes.

Accepted Answer

A)  maximum likelihood
B)  parsimony
C)  distance
D)  rooted treeE) All of the above
F) A) and B)

Question 5

Through _____, alleles may disappear from a population simply by chance.

Accepted Answer

A)  negative directional selection
B)  genetic rescue
C)  genetic drift
D)  fixation
E)  underdominanceF) A) and B)
G) A) and E)

Question 6

_____ is when the heterozygote has a higher fitness than either of the two homozygotes (W11 12 > W22) .Allele frequencies will change in this population until _____.

Accepted Answer

A)  Underdominance; an allele is fixed
B)  Homeostasis; Hardy-Weinberg equilibrium is achieved
C)  Dominance; a tipping point is passed
D)  Recombination; linkage equilibrium is obtained
E)  Overdominance; a stable equilibrium is reachedF) All of the above
G) A) and D)

Question 7

A Mendelian population is defined by individuals as:

Accepted Answer

A)  interbreeding.
B)  inbreeding.
C)  evolving.
D)  segregating.
E)  migrating.F) A) and B)
G) B) and D)

Question 8

DNA typing is used to compare evidence DNA (E) left at a crime scene to two suspects (S1 and S2) .Suspect 1 is excluded by the evidence, but suspect 2 remains included.What is the frequency of suspect 2's genotype if the allele frequencies in the population are f(A1) = 0.1, f(A2) = 0.2, and f(A3) = 0.7 and the population is at Hardy-Weinberg equilibrium? 1) = 0.1, f(A2) = 0.2, and f(A3) = 0.7 and the population is at Hardy-Weinberg equilibrium?   A) 0) 01 B) 0) 02 C) 0) 04 D) 0) 28 E) 0) 49" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  0) 01
B)  0) 02
C)  0) 04
D)  0) 28
E)  0) 49F) A) and E)
G) A) and D)

Question 9

_____ refers to the situation where the heterozygote has a lower fitness than both homozygotes (W11 > W12 22) .

Accepted Answer

A)  Overdominance
B)  Hardy-Weinberg equilibrium
C)  Underdominance
D)  Heterozygote superiority
E)  Genetic rescueF) B) and D)
G) A) and B)

Question 10

Suppose that in a population the frequency of a particular recessive condition is 1/400.Assume the presence of only a dominant allele (A) and a recessive allele (a) in the population and that the population is at Hardy-Weinberg equilibrium.What is the frequency of heterozygotes in the population?

Accepted Answer

A)  0) 0025
B)  0) 05
C)  0) 095
D)  0) 9025
E)  0) 0475F) A) and B)
G) C) and E)

Question 11

Which of the following evolutionary forces does NOT normally change allele frequencies?

Accepted Answer

A)  Nonrandom mating
B)  Mutation
C)  Selection
D)  Drift
E)  MigrationF) A) and B)
G) All of the above

Question 12

When an allele has a frequency of 1.0 in a population, it is _____ in the population.

Accepted Answer

A)  lost
B)  dominant
C)  overdominant
D)  fixed
E)  recessiveF) A) and C)
G) C) and D)

Question 13

Which of the following does NOT bring about evolution in a population?

Accepted Answer

A)  Small population size
B)  Migration of individuals from a population with a different genetic structure
C)  Mutation
D)  Selection
E)  Random matingF) A) and B)
G) None of the above

Question 14

The _____ is all of the genetic information within a Mendelian population.

Accepted Answer

A)  effective population size
B)  Hardy-Weinberg equilibrium
C)  fitness
D)  genotypic frequency
E)  gene poolF) B) and C)
G) C) and D)

Question 15

Horizontal gene transfer is MOST common:

Accepted Answer

A)  among bacteria.
B)  among eukaryotes.
C)  among viruses.
D)  from eukaryotes to bacteria.
E)  from plants to animals.F) B) and C)
G) B) and E)

Question 16

Which region of a gene should have the highest rates of substitution?

Accepted Answer

A)  First position of a codon
B)  Second position of a codon
C)  Third position of a codon
D)  5' flanking region
E)  3' untranslated regionF) C) and E)
G) A) and C)

Question 17

_____ occurs when one allele or trait is favored over another.

Accepted Answer

A)  Directional selection
B)  Mutation-selection equilibrium
C)  Founder effects
D)  Stabilizing selection
E)  OverdominanceF) B) and C)
G) None of the above

Question 18

_____ is the idea that, if postzygotic isolating mechanisms exist between two species, then natural selection will favor traits that lead to the evolution of prezygotic isolating mechanisms.

Accepted Answer

A)  Hybrid breakdown
B)  Reinforcement
C)  Gametic isolation
D)  Phylogenetic species
E)  Hybrid inviabilityF) A) and D)
G) A) and E)

Exam 18: Population and Evolutionary Genetics

Through _____, alleles may disappear from a population simply by chance.

Correct Answer
verified

Which of the following does NOT bring about evolution in a population?

Correct Answer
verified

_____ occurs when one allele or trait is favored over another.

Correct Answer
verified

Which of the following evolutionary forces does NOT normally change allele frequencies?

Correct Answer
verified

When an allele has a frequency of 1.0 in a population, it is _____ in the population.

Correct Answer
verified

_____ ultimately produces all new genetic variation in a population.

Correct Answer
verified

Correct Answer
verified

Suppose that in a population the frequency of a particular recessive condition is 1/400.Assume the presence of only a dominant allele (A) and a recessive allele (a) in the population and that the population is at Hardy-Weinberg equilibrium.What is the frequency of heterozygotes in the population?

Correct Answer
verified

_____ is the movement of genes between populations.

Correct Answer
verified

_____ is the idea that, if postzygotic isolating mechanisms exist between two species, then natural selection will favor traits that lead to the evolution of prezygotic isolating mechanisms.

Correct Answer
verified

Is the buildup of reproductive barriers in two allopatric populations the result of natural selection for reproductive isolation?

Correct Answer
verified
No.Selection has no means of acting beca...
View Answer

_____ refers to the situation where the heterozygote has a lower fitness than both homozygotes (W₁₁ > W₁₂ < W₂₂) .

Correct Answer
verified

_ is when the heterozygote has a higher fitness than either of the two homozygotes (W₁₁ < W₁₂ > W₂₂) .Allele frequencies will change in this population until _.

Correct Answer
verified

The _____ is all of the genetic information within a Mendelian population.

Correct Answer
verified

The _____ approach to inferring relationships among species selects the phylogeny that minimizes the number of evolutionary changes.

Correct Answer
verified

Horizontal gene transfer is MOST common:

Correct Answer
verified

A Mendelian population is defined by individuals as:

Correct Answer
verified

Which region of a gene should have the highest rates of substitution?

Correct Answer
verified

Exam 18: Population and Evolutionary Genetics

Through _____, alleles may disappear from a population simply by chance.

Correct AnswerverifiedShow Answer

Which of the following does NOT bring about evolution in a population?

Correct AnswerverifiedShow Answer

_____ occurs when one allele or trait is favored over another.

Correct AnswerverifiedShow Answer

Which of the following evolutionary forces does NOT normally change allele frequencies?

Correct AnswerverifiedShow Answer

When an allele has a frequency of 1.0 in a population, it is _____ in the population.

Correct AnswerverifiedShow Answer

_____ ultimately produces all new genetic variation in a population.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Suppose that in a population the frequency of a particular recessive condition is 1/400.Assume the presence of only a dominant allele (A) and a recessive allele (a) in the population and that the population is at Hardy-Weinberg equilibrium.What is the frequency of heterozygotes in the population?

Correct AnswerverifiedShow Answer

_____ is the movement of genes between populations.

Correct AnswerverifiedShow Answer

_____ is the idea that, if postzygotic isolating mechanisms exist between two species, then natural selection will favor traits that lead to the evolution of prezygotic isolating mechanisms.

Correct AnswerverifiedShow Answer

Is the buildup of reproductive barriers in two allopatric populations the result of natural selection for reproductive isolation?

Correct AnswerverifiedNo.Selection has no means of acting beca...View AnswerShow Answer

_____ refers to the situation where the heterozygote has a lower fitness than both homozygotes (W11 > W12 < W22) .

Correct AnswerverifiedShow Answer

_____ is when the heterozygote has a higher fitness than either of the two homozygotes (W11 < W12 > W22) .Allele frequencies will change in this population until _____.

Correct AnswerverifiedShow Answer

The _____ is all of the genetic information within a Mendelian population.

Correct AnswerverifiedShow Answer

The _____ approach to inferring relationships among species selects the phylogeny that minimizes the number of evolutionary changes.

Correct AnswerverifiedShow Answer

Horizontal gene transfer is MOST common:

Correct AnswerverifiedShow Answer

A Mendelian population is defined by individuals as:

Correct AnswerverifiedShow Answer

Which region of a gene should have the highest rates of substitution?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
No.Selection has no means of acting beca...
View Answer

_____ refers to the situation where the heterozygote has a lower fitness than both homozygotes (W₁₁ > W₁₂ < W₂₂) .

Correct Answer
verified

_ is when the heterozygote has a higher fitness than either of the two homozygotes (W₁₁ < W₁₂ > W₂₂) .Allele frequencies will change in this population until _.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified