Question 1

Why would the population of royal families (of England as well as other countries) not qualify for the Hardy-Weinberg principle?

Accepted Answer

The royal families are small a...

Question 2

If an animal population is diploid, then each individual possesses:

Accepted Answer

A)   one allele for each locus.
B)   two alleles for each locus.
C)   three or more alleles for each locus.
D)   a partial set of alleles found in each cell.
E)   a complete set of alleles found in each chromosome.F) B) and C)
G) C) and D) B

Question 3

In nonrandom mating, each individual in a population has an equal chance of mating with any individual of the opposite sex.

Accepted Answer

A) True 
 B)False

Question 4

____________________ and frequency-dependent selection are mechanisms that preserve balanced polymorphism.

Accepted Answer

A)   the founder effect
B)   genetic drift.
C)   heterozygote advantage
D)   stabilizing selection
E)   disruptive selection.F) A) and C)
G) A) and E)

Question 5

Variation is introduced into a population through _________________, which is an unpredictable change in deoxyribonucleic acid.

Accepted Answer

A)   mutation
B)   migration
C)   inbreeding
D)   genetic drift
E)   natural selectionF) B) and C)
G) A) and C)

Question 6

Which is an example of nonrandom mating?

Accepted Answer

A)   Selecting a mate by their genotype
B)   Selecting a mate by their phenotype
C)   Selecting a mate by their species richness
D)   Selecting a mate by their family relationship
E)   Selecting a mate by their success of defeating anotherF) A) and D)
G) A) and E) B

Question 7

Which best describes the effect of positive assortative mating in a population?

Accepted Answer

A)   It causes natural selection.
B)   It increases homozygosity.
C)   It changes allele frequencies.
D)   It stabilizes genotype frequencies.
E)   It produces more mutations each generation.F) A) and C)
G) C) and D)

Question 8

A population in which the allele and genotype frequencies do not change over time is said to be in:

Accepted Answer

A)   genetic stasis.
B)   allele balance.
C)   genetic equilibrium.
D)   population stability.
E)   phenotype equilibrium.F) All of the above
G) B) and D)

Question 9

The Hardy-Weinberg principle shows that if the population is large , inheritance alone does not cause changes in allele frequency.

Accepted Answer

A) True 
 B)False

Question 10

Balanced polymorphism can be maintained by the combined actions of:

Accepted Answer

A)   the founder effect and genetic drift.
B)   heterozygote advantage and genetic drift.
C)   heterozygote advantage and the founder effect.
D)   frequency-dependent selection and the founder effect.
E)   heterozygote advantage and frequency-dependent selection.F) A) and E)
G) A) and D)

Question 11

In the human species, a heterozygote advantage is demonstrated by which condition?

Accepted Answer

A)   Albinism
B)   Hemophilia
C)   Down syndrome
D)   Sickle cell anemia
E)   Klinefelter syndromeF) All of the above
G) B) and C)

Question 12

The movement of 25-year-old fertile individuals between Mexico and Canada will eventually contribute to:

Accepted Answer

A)   mutation.
B)   gene flow.
C)   genetic drift.
D)   natural selection.
E)   directional selection.F) D) and E)
G) B) and D)

Question 13

When mutations are not passed on from one generation to the next, then a mutation can:

Accepted Answer

A)   arise in somatic cells.
B)   result from genetic drift.
C)   arise from the founder effect.
D)   be balanced by polymorphism.
E)   result from disruptive selection.F) D) and E)
G) C) and D) A

Question 14

In order to meet the conditions of the Hardy-Weinberg predictions, a population must:

Accepted Answer

A)   be very large.
B)   mutate very quickly.
C)   have extensive mating rituals.
D)   have a large number of immigrants.
E)   have a high rate of natural selection.F) C) and D)
G) A) and B)

Question 15

The migration of breeding individuals between populations causes a corresponding movement of alleles, which is referred to as:

Accepted Answer

A)   mutation.
B)   gene flow.
C)   genetic drift.
D)   natural selection.
E)   directional selection.F) A) and E)
G) A) and D)

Question 16

Evolution that involves changes in allele frequencies over just a few successive generations is referred to as:

Accepted Answer

A)   natural selection.
B)   microevolution.
C)   macroevolution.
D)   stabilizing selection.
E)   directional selection.F) A) and B)
G) C) and E)

Question 17

_____________________ is a special type of directional selection in which there is a trend in several directions rather than just one.

Accepted Answer

A)   gene flow
B)   genetic drift
C)   natural selection
D)   disruptive selection
E)   beneficial mutationsF) A) and D)
G) C) and D)

Question 18

For a particular gene, the frequency of the dominant allele H is 0.65. The total population size is 10,000 individuals. In addition, the homozygous recessive condition results in living but sterile offspring. Fill in the table of values for the generations indicated: 
  Does this population exhibit Hardy-Weinberg equilibrium? Why or why not? If not, what assumptions does the Hardy-Weinberg principle make that appear to be inapplicable in this situation?

Accepted Answer

Concepts to Consider: The Hardy-Weinberg...

Question 19

A phenotype frequency is the proportion of a particular phenotype in the population.

Accepted Answer

A) True 
 B)False

Question 20

The Hardy-Weinberg principle:

Accepted Answer

A)   states that allele and genotype frequencies change from generation to generation in a population at genetic equilibrium.
B)   shows that if the population is large, the process of inheritance by itself causes changes in allele frequencies.
C)   allows biologists to calculate allele frequencies in a given population if we know the genotype frequencies, and vice versa.
D)   represents an ideal situation that seldom does not occur in the natural world.
E)   is not essential to understanding the mechanisms of evolutionary change in sexually reproducing populations.F) B) and D)
G) C) and E)

Exam 19: Evolutionary Change in Populations

Why would the population of royal families (of England as well as other countries) not qualify for the Hardy-Weinberg principle?

Correct Answer
verified
The royal families are small a...
View Answer

If an animal population is diploid, then each individual possesses:

Correct Answer
verified
B

In nonrandom mating, each individual in a population has an equal chance of mating with any individual of the opposite sex.

Correct Answer
verified

____________________ and frequency-dependent selection are mechanisms that preserve balanced polymorphism.

Correct Answer
verified

Variation is introduced into a population through _________________, which is an unpredictable change in deoxyribonucleic acid.

Correct Answer
verified

Which is an example of nonrandom mating?

Correct Answer
verified
B

Which best describes the effect of positive assortative mating in a population?

Correct Answer
verified

A population in which the allele and genotype frequencies do not change over time is said to be in:

Correct Answer
verified

The Hardy-Weinberg principle shows that if the population is large , inheritance alone does not cause changes in allele frequency.

Correct Answer
verified

Balanced polymorphism can be maintained by the combined actions of:

Correct Answer
verified

In the human species, a heterozygote advantage is demonstrated by which condition?

Correct Answer
verified

The movement of 25-year-old fertile individuals between Mexico and Canada will eventually contribute to:

Correct Answer
verified

When mutations are not passed on from one generation to the next, then a mutation can:

Correct Answer
verified
A

In order to meet the conditions of the Hardy-Weinberg predictions, a population must:

Correct Answer
verified

The migration of breeding individuals between populations causes a corresponding movement of alleles, which is referred to as:

Correct Answer
verified

Evolution that involves changes in allele frequencies over just a few successive generations is referred to as:

Correct Answer
verified

_____________________ is a special type of directional selection in which there is a trend in several directions rather than just one.

Correct Answer
verified

Correct Answer
verified
Concepts to Consider: The Hardy-Weinberg...
View Answer

A phenotype frequency is the proportion of a particular phenotype in the population.

Correct Answer
verified

The Hardy-Weinberg principle:

Correct Answer
verified

Exam 19: Evolutionary Change in Populations

Why would the population of royal families (of England as well as other countries) not qualify for the Hardy-Weinberg principle?

Correct AnswerverifiedThe royal families are small a...View AnswerShow Answer

If an animal population is diploid, then each individual possesses:

Correct AnswerverifiedB

In nonrandom mating, each individual in a population has an equal chance of mating with any individual of the opposite sex.

Correct AnswerverifiedShow Answer

____________________ and frequency-dependent selection are mechanisms that preserve balanced polymorphism.

Correct AnswerverifiedShow Answer

Variation is introduced into a population through _________________, which is an unpredictable change in deoxyribonucleic acid.

Correct AnswerverifiedShow Answer

Which is an example of nonrandom mating?

Correct AnswerverifiedB

Which best describes the effect of positive assortative mating in a population?

Correct AnswerverifiedShow Answer

A population in which the allele and genotype frequencies do not change over time is said to be in:

Correct AnswerverifiedShow Answer

The Hardy-Weinberg principle shows that if the population is large , inheritance alone does not cause changes in allele frequency.

Correct AnswerverifiedShow Answer

Balanced polymorphism can be maintained by the combined actions of:

Correct AnswerverifiedShow Answer

In the human species, a heterozygote advantage is demonstrated by which condition?

Correct AnswerverifiedShow Answer

The movement of 25-year-old fertile individuals between Mexico and Canada will eventually contribute to:

Correct AnswerverifiedShow Answer

When mutations are not passed on from one generation to the next, then a mutation can:

Correct AnswerverifiedA

In order to meet the conditions of the Hardy-Weinberg predictions, a population must:

Correct AnswerverifiedShow Answer

The migration of breeding individuals between populations causes a corresponding movement of alleles, which is referred to as:

Correct AnswerverifiedShow Answer

Evolution that involves changes in allele frequencies over just a few successive generations is referred to as:

Correct AnswerverifiedShow Answer

_____________________ is a special type of directional selection in which there is a trend in several directions rather than just one.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedConcepts to Consider: The Hardy-Weinberg...View AnswerShow Answer

A phenotype frequency is the proportion of a particular phenotype in the population.

Correct AnswerverifiedShow Answer

The Hardy-Weinberg principle:

Correct AnswerverifiedShow Answer

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verified
The royal families are small a...
View Answer

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B

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B

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A

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Correct Answer
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Concepts to Consider: The Hardy-Weinberg...
View Answer

Correct Answer
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Correct Answer
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