Question 1

Explain how the founder effect can lead to a descendant population that differs greatly from its parent population over a relatively short period of time.

Accepted Answer

Founder effect is a special kind of gene...

Question 2

Which of the following is the result of a single-point mutation on chromosome 11?

Accepted Answer

A)  Marfan syndrome
B)  Down syndrome
C)  Kleinfelter's syndrome
D)  Sickle-cell anemiaE) A) and B)
F) All of the above

Question 3

Why is the peppered moth an excellent example of directional selection?

Accepted Answer

The peppered moth exists in two forms, o...

Question 4

Fitness trade-off refers to selection favoring which genotype?

Accepted Answer

A)  homozygous dominant
B)  homozygous recessive
C)  heterozygous
D)  no genotype is favoredE) C) and D)
F) B) and D)

Question 5

Transposable elements are DNA sequences that

Accepted Answer

A)  are not coded to produce proteins.
B)  contain numerous point mutations.
C)  occur only on the X and Y chromosomes.
D)  insert themselves into other parts of the genome.E) A) and B)
F) A) and C)

Question 6

The malarial parasite is transmitted to humans by

Accepted Answer

A)  dirty drinking water.
B)  mosquitoes.
C)  rats.
D)  monkeys.E) A) and B)
F) A) and C)

Question 7

An individual who displays the disease sickle-cell anemia must have inherited the deleterious allele from both phenotypically normal parents.This individual is therefore

Accepted Answer

A)  homozygous dominant.
B)  homozygous recessive.
C)  heterozygous.
D)  haplozygous.E) None of the above
F) B) and D)

Question 8

Klinefelter's syndrome results

Accepted Answer

A)  from males passing on an extra copy of chromosome #21.
B)  from females passing on an extra copy of chromosome #21.
C)  from females passing on an extra copy of the Y chromosome (resulting in a 47-chromosome, XXY karyotype) .
D)  from males passing on an extra copy of the X chromosome (resulting in a 47-chromosome, XXY karyotype) .E) A) and B)
F) C) and D) D

Question 9

Studies of Darwin's finches have found that at certain points in time all finches on the island have either wide beaks or sharp, narrow beaks.The type of evolution that leads to this phenotype distribution is

Accepted Answer

A)  directional selection.
B)  natural selection.
C)  disruptive selection.
D)  stabilizing selection.E) B) and C)
F) None of the above

Question 10

Evolution is caused by which of the following?

Accepted Answer

A)  mutation
B)  gene flow
C)  genetic drift
D)  all of the aboveE) A) and C)
F) A) and B)

Question 11

Patrilocal societies are expected to display

Accepted Answer

A)  greater mtDNA diversity than Y chromosome diversity.
B)  roughly equivalent mtDNA and Y chromosome diversity.
C)  greater Y chromosome diversity than mtDNA diversity.
D)  no strong correlation between societal structure and genetic diversity (none of the above) .E) A) and B)
F) A) and C)

Question 12

A point mutation that does not result in a change to the amino acid coded for is said to be a

Accepted Answer

A)  spontaneous mutation.
B)  synonymous mutation.
C)  selective mutation.
D)  stabilizing mutation.E) B) and D)
F) C) and D)

Question 13

Familial hypercholesterolemia, an autosomal dominant disease, is five times more frequent in the Afrikaner population of South Africa than in the population of Europe or the United States.This represents an example of

Accepted Answer

A)  natural selection.
B)  bottle neck.
C)  founder effect.
D)  kin selection.E) B) and C)
F) B) and D) C

Question 14

The effects of ________ have increased from 10,000 years ago to the present.

Accepted Answer

A)  mutations
B)  gene flow
C)  genetic drift
D)  natural selectionE) A) and D)
F) None of the above

Question 15

The best-documented case of industrial melanism involves

Accepted Answer

A)  Galápagos finches.
B)  dung beetles.
C)  monarch butterflies.
D)  peppered moths.E) C) and D)
F) None of the above

Question 16

A random change in allele frequencies over time is known as

Accepted Answer

A)  genetic drift.
B)  gene flow.
C)  admixture.
D)  gene migration.E) A) and D)
F) None of the above

Question 17

The evolution of the modern horse with a single hoof on each limb from a dog-sized ancestor with multiple digits is an example of

Accepted Answer

A)  macroevolution.
B)  stabilizing selection.
C)  disruptive selection.
D)  microevolution.E) C) and D)
F) All of the above

Question 18

Another name for the evolutionary force called gene flow is

Accepted Answer

A)  founder effect.
B)  disruptive selection.
C)  admixture.
D)  transposition.E) B) and C)
F) B) and D)

Question 19

Over a period of two generations, the frequency of green dung beetles in a population shifts from 75% to 71% while the frequency of brown dung beetles within this population shifts from 25% to 29%.This is an example of

Accepted Answer

A)  minievolution.
B)  microevolution.
C)  millievolution.
D)  nanoevolution.E) A) and C)
F) A) and D) B

Question 20

________ is the force of evolution that is most powerful when acting on very small populations.

Accepted Answer

A)  Gene flow
B)  Mutation
C)  Genetic drift
D)  Founder effectE) A) and B)
F) B) and D)

Exam 4: Genes and Their Evolution: Population Genetics

Explain how the founder effect can lead to a descendant population that differs greatly from its parent population over a relatively short period of time.

Correct AnswerverifiedFounder effect is a special kind of gene...View AnswerShow Answer

Which of the following is the result of a single-point mutation on chromosome 11?

Correct AnswerverifiedShow Answer

Why is the peppered moth an excellent example of directional selection?

Correct AnswerverifiedThe peppered moth exists in two forms, o...View AnswerShow Answer

Fitness trade-off refers to selection favoring which genotype?

Correct AnswerverifiedShow Answer

Transposable elements are DNA sequences that

Correct AnswerverifiedShow Answer

The malarial parasite is transmitted to humans by

Correct AnswerverifiedShow Answer

An individual who displays the disease sickle-cell anemia must have inherited the deleterious allele from both phenotypically normal parents.This individual is therefore

Correct AnswerverifiedShow Answer

Klinefelter's syndrome results

Correct AnswerverifiedD

Studies of Darwin's finches have found that at certain points in time all finches on the island have either wide beaks or sharp, narrow beaks.The type of evolution that leads to this phenotype distribution is

Correct AnswerverifiedShow Answer

Evolution is caused by which of the following?

Correct AnswerverifiedShow Answer

Patrilocal societies are expected to display

Correct AnswerverifiedShow Answer

A point mutation that does not result in a change to the amino acid coded for is said to be a

Correct AnswerverifiedShow Answer

Familial hypercholesterolemia, an autosomal dominant disease, is five times more frequent in the Afrikaner population of South Africa than in the population of Europe or the United States.This represents an example of

Correct AnswerverifiedC

The effects of ________ have increased from 10,000 years ago to the present.

Correct AnswerverifiedShow Answer

The best-documented case of industrial melanism involves

Correct AnswerverifiedShow Answer

A random change in allele frequencies over time is known as

Correct AnswerverifiedShow Answer

The evolution of the modern horse with a single hoof on each limb from a dog-sized ancestor with multiple digits is an example of

Correct AnswerverifiedShow Answer

Another name for the evolutionary force called gene flow is

Correct AnswerverifiedShow Answer

Over a period of two generations, the frequency of green dung beetles in a population shifts from 75% to 71% while the frequency of brown dung beetles within this population shifts from 25% to 29%.This is an example of

Correct AnswerverifiedB

________ is the force of evolution that is most powerful when acting on very small populations.

Correct AnswerverifiedShow Answer

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Founder effect is a special kind of gene...
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The peppered moth exists in two forms, o...
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D

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C

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B

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