Question 1

What is the genotype of an individual that is lives in protection from both sickle cell disease and malaria?

Accepted Answer

A)   HbAHbA
B)   HbAHbS
C)   HbSHbS
D)   HbS Hbs
E)   HbA Hba

Question 2

A fraction of the original green frog population survives to reproduce and generate the new population.If the survivors of the original population survived by chance,then this event is an example of

Accepted Answer

A)   natural selection.
B)   genetic drift.
C)   founder effect.
D)   industrial melanism.

Question 3

Polydactylism (possessing more than five fingers per hand)within the Amish population in Pennsylvania is considered an example of founder effect.This is because the frequency of polydactylism among the Amish in Pennsylvania is identical to its frequency among the Amish population in Germany.

Accepted Answer

A) True 
 B)False

Question 4

In random mating

Accepted Answer

A)   individuals choose the most attractive mate.
B)   there is no influence on mate choice.
C)   breeding occurs between two different species.
D)   breeding occurs between two different subspecies.
E)   fertile offspring are not produced. B

Question 5

If a population recovers to its original population size after experiencing a bottleneck,which statement is correct regarding this population?

Accepted Answer

A)   The recovered population is as likely to go extinct as is the population prior to the bottleneck.
B)   The bottleneck subjected the population to directional selection.
C)   The recovered population shows less genetic diversity that the population prior to the bottleneck.
D)   The recovered population shows more genetic diversity than the population prior to the bottleneck.
E)   The recovered population is more likely to go extinct as is the population prior to the bottleneck

Question 6

What statement is false regarding the differences between a biological species and subspecies?

Accepted Answer

A)   Crosses between biological species cannot produce fertile offspring, crosses between subspecies can produce fertile offspring.
B)   Subspecies are "races" within a single species.
C)   Gene flow exists among different subspecies but not among species.
D)   Greater degrees of allelic frequencies exist between species than among subspecies.
E)   Phenotypes of different species are easily recognizable; little to no phenotypic variation exists among subspecies.

Question 7

Figure: 
-In the figure shown here,flower color of a population is distributed in a bell-shaped normal curve.If the white and yellow flower colors increase in frequency in the population,this would illustrate

Accepted Answer

A)   stabilizing selection.
B)   disruptive selection.
C)   directional selection.
D)   genetic drift.

Question 8

If people with freckles preferentially mate with other people with freckles,this would be an example of

Accepted Answer

A)   microevolution.
B)   natural selection.
C)   genetic drift.
D)   nonrandom mating.
E)   gene flow.

Question 9

All of the genes and all of their associated alleles within a population represent the population's

Accepted Answer

A)   genotype.
B)   gene flow.
C)   gene pool.
D)   genome.
E)   Hardy-Weinberg equilibrium.

Question 10

Figure: 
-In the figure shown here,flower color of a population is distributed in a bell-shaped normal curve.If the pink flower color increases in frequency in the population,this would illustrate

Accepted Answer

A)   stabilizing selection.
B)   disruptive selection.
C)   directional selection.
D)   genetic drift.

Question 11

Which of the following does not generate genetic variation within a population?

Accepted Answer

A)   genetic recombination
B)   independent assortment of alleles
C)   sexual reproduction
D)   mutations
E)   adaptation

Question 12

h  The figure shown here represents stabilizing selection.What happens when an individual is produced that possesses a trait far away from the mean value?

Accepted Answer

A)   That extreme individual will likely not survive and reproduce.
B)   That extreme individual will be more likely to survive and reproduce.
C)   That extreme individual will have neither an advantage nor a disadvantage than other individuals.
D)   All phenotypes have equal likelihood of surviving and reproducing.
E)   The average phenotype is less likely to survive and reproduce.

Question 13

The conditions required by the Hardy-Weinberg equilibrium are commonly found in nature.

Accepted Answer

A) True 
 B)False  False

Question 14

If the average leg size of a reptile continually got smaller through generations,this would be an example of

Accepted Answer

A)   disruptive selection.
B)   stabilizing selection.
C)   directional selection.
D)   genetic drift.
E)   bottleneck effect.

Question 15

Which Hardy-Weinberg condition is violated by sexual selection?

Accepted Answer

A)   no mutations
B)   no natural selection
C)   random mating
D)   no genetic drift
E)   no gene flow C

Question 16

Directional selection in the modern horse is demonstrated by

Accepted Answer

A)   the gradual decrease in size over time.
B)   the rapid decrease in size over time.
C)   the gradual increase in size over time.
D)   the rapid increase in size over time.
E)   the extinction of other horse species.

Question 17

If half of a population is homozygous recessive,what is p?

Accepted Answer

A)   0.5
B)   0.707
C)   0.25
D)   0.293
E)   0.1

Question 18

Why do prokaryotes and eukaryotes differ in their reliance on mutations for generating genetic variation?

Accepted Answer

A)   Prokaryotes are smaller in size than eukaryotes.
B)   Prokaryotes sexually reproduce, eukaryotes do not.
C)   Eukaryotes sexually reproduce, prokaryotes do not.
D)   Eukaryotes possess a nucleus, prokaryotes do not.
E)   Prokaryotes are single-celled, eukaryotes are multicellular.

Question 19

Figure: 
-In the figure shown here,flower color of a population is distributed in a bell-shaped normal curve.If the white flower color increases in frequency in the population,this would illustrate

Accepted Answer

A)   stabilizing selection.
B)   disruptive selection.
C)   directional selection.
D)   genetic drift.

Question 20

The effects of genetic drift are more significant in

Accepted Answer

A)   large populations.
B)   small populations.
C)   populations that mate randomly.
D)   populations that are undergoing natural selection.
E)   populations in which the frequency of mutations is high.

Exam 15: Evolution on a Small Scale

What is the genotype of an individual that is lives in protection from both sickle cell disease and malaria?

Correct AnswerverifiedShow Answer

A fraction of the original green frog population survives to reproduce and generate the new population.If the survivors of the original population survived by chance,then this event is an example of

Correct AnswerverifiedShow Answer

Polydactylism (possessing more than five fingers per hand)within the Amish population in Pennsylvania is considered an example of founder effect.This is because the frequency of polydactylism among the Amish in Pennsylvania is identical to its frequency among the Amish population in Germany.

Correct AnswerverifiedShow Answer

In random mating

Correct AnswerverifiedB

If a population recovers to its original population size after experiencing a bottleneck,which statement is correct regarding this population?

Correct AnswerverifiedShow Answer

What statement is false regarding the differences between a biological species and subspecies?

Correct AnswerverifiedShow Answer

Figure: -In the figure shown here,flower color of a population is distributed in a bell-shaped normal curve.If the white and yellow flower colors increase in frequency in the population,this would illustrate

Correct AnswerverifiedShow Answer

If people with freckles preferentially mate with other people with freckles,this would be an example of

Correct AnswerverifiedShow Answer

All of the genes and all of their associated alleles within a population represent the population's

Correct AnswerverifiedShow Answer

Figure: -In the figure shown here,flower color of a population is distributed in a bell-shaped normal curve.If the pink flower color increases in frequency in the population,this would illustrate

Correct AnswerverifiedShow Answer

Which of the following does not generate genetic variation within a population?

Correct AnswerverifiedShow Answer

h The figure shown here represents stabilizing selection.What happens when an individual is produced that possesses a trait far away from the mean value?

Correct AnswerverifiedShow Answer

The conditions required by the Hardy-Weinberg equilibrium are commonly found in nature.

Correct AnswerverifiedFalse

If the average leg size of a reptile continually got smaller through generations,this would be an example of

Correct AnswerverifiedShow Answer

Which Hardy-Weinberg condition is violated by sexual selection?

Correct AnswerverifiedC

Directional selection in the modern horse is demonstrated by

Correct AnswerverifiedShow Answer

If half of a population is homozygous recessive,what is p?

Correct AnswerverifiedShow Answer

Why do prokaryotes and eukaryotes differ in their reliance on mutations for generating genetic variation?

Correct AnswerverifiedShow Answer

Figure: -In the figure shown here,flower color of a population is distributed in a bell-shaped normal curve.If the white flower color increases in frequency in the population,this would illustrate

Correct AnswerverifiedShow Answer

The effects of genetic drift are more significant in

Correct AnswerverifiedShow Answer

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B

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False

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C

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