Question 1

An allele frequency is:

Accepted Answer

A)  the number of all alleles in a population.
B)  the relative proportion of a given allele in a population.
C)  the sum of all genes in a population.
D)  the number of different types of alleles in a population.

Question 2

In a single family, the parents have brown eyes but all five of their children have green eyes. This is an example of evolution. True or False?

Accepted Answer

A) True 
 B)False

Question 3

Which of the following can affect a small, endangered population so severely that it goes extinct?

Accepted Answer

A)  matings with a closely related species
B)  increased mating opportunities
C)  lost alleles and/or low genetic diversity
D)  artificially adding new genes
E)  sexual selection

Question 4

Which trait is the BEST example of an adaptation?

Accepted Answer

A)  a new mutation that confers Tay-Sachs disease in humans
B)  a mutation resulting in weak branches in a species of tree that lives in windy regions
C)  a longer tongue in an insect-eating mammal that feeds on insects that live in shallow burrows
D)  a mutation resulting in a heat-resistant enzyme in a bacterium living in a hot spring
E)  a shorter neck in a giraffe that lives in an area with many rival males and tall trees

Question 5

Despite causing a life-threatening disease, the sickle-cell allele in some areas of Africa has remained in high frequency in those populations because it protects against malaria. In the United States, malaria was eradicated shortly before World War II by eliminating the mosquito that spreads the disease. What is likely to happen to the frequency of the sickle-cell allele in African Americans living in the United States?

Accepted Answer

A)  The frequency of the sickle-cell allele will increase.
B)  The frequency of the sickle-cell allele will decrease.
C)  The frequency of the sickle-cell allele will not change.
D)  The sickle-cell allele will disappear from the African American population.
E)  The normal allele will disappear from the African American population.

Question 6

Organisms that have the greatest reproductive success are considered the most evolutionarily fit. True or False?

Accepted Answer

A) True 
 B)False

Question 7

Evolution can be defined as change in ________ in a population.

Accepted Answer

The answer of Evolution can be defined as change in...

Question 8

Imagine a population of monkeys in South America whose habitat has been reduced to the point where only 20 individuals survive. This is an example of:

Accepted Answer

A)  genetic drift.
B)  the founder effect.
C)  natural selection.
D)  a population bottleneck.
E)  sexual selection.

Question 9

The interaction of genes and environment produces a specific:

Accepted Answer

A)  genotype.
B)  allele.
C)  population.
D)  phenotype.
E)  gene pool.

Question 10

If the tallest and shortest individuals of a population of humans do not survive and reproduce as well as the individuals of "average" height, which type of selection would most likely result?

Accepted Answer

A)  directional selection
B)  disruptive selection
C)  stabilizing selection
D)  artificial selection

Question 11

The Pennsylvania Amish have a very high frequency of an unusual allele that results in short arms and legs and extra fingers. This high frequency is thought to be the result of:

Accepted Answer

A)  the founder effect.
B)  nonrandom mutations.
C)  a population bottleneck.
D)  coevolution.
E)  the addition of new members to an already established population.

Question 12

In hamsters, the dominant allele B codes for a black coat and the recessive allele b codes for a brown coat. In the population shown in the figure above, what is the most frequent phenotype?

Accepted Answer

The answer of In hamsters, the dominant allele B codes...

Question 13

Which of the following can evolve?

Accepted Answer

A)  individuals
B)  populations
C)  genes
D)  communities

Question 14

Imagine that one of the original four mice that escape from a research lab is blind due to a genetic defect. If the mice breed and most of the mice born in subsequent generations are blind from birth, this is most likely a case of:

Accepted Answer

A)  artificial selection.
B)  the founder effect.
C)  selective mutation.
D)  an equilibrium population.
E)  natural selection.

Question 15

Based on the information shown in the figure, what do you predict the fourth generation will look like?

Accepted Answer

A)  All the hamsters will be black.
B)  All the hamsters will be brown.
C)  All the hamsters will have mottled brown/black fur.
D)  Five hamsters will be black.
E)  There is no way to predict what the fourth generation will look like.

Question 16

Having greater evolutionary fitness means:

Accepted Answer

A)  having more offspring.
B)  being stronger.
C)  being able to produce more sperm or eggs.
D)  being better able to survive.
E)  being larger or faster.

Question 17

The 30,000 elephant seals alive today are genetically very similar due to:

Accepted Answer

A)  natural selection.
B)  artificial selection.
C)  the bottleneck effect.
D)  the founder effect.
E)  random mutation.

Question 18

A population with ________ is at risk for extinction.

Accepted Answer

limited ge...

Question 19

The use of antibiotics caused the mutation that produced MRSA. True or False?

Accepted Answer

A) True 
 B)False

Question 20

From an evolutionary point of view, what important process occurs when a young male baboon leaves the troop that he was born in to join another troop?

Accepted Answer

A)  nonrandom mating
B)  gene flow
C)  the bottleneck effect
D)  natural selection
E)  genetic drift

Exam 15: How Populations Evolve

Having greater evolutionary fitness means:

Correct Answer
verified

From an evolutionary point of view, what important process occurs when a young male baboon leaves the troop that he was born in to join another troop?

Correct Answer
verified

Evolution can be defined as change in ________ in a population.

Correct Answer
verified

The interaction of genes and environment produces a specific:

Correct Answer
verified

A population with ________ is at risk for extinction.

Correct Answer
verified
limited ge...
View Answer

The Pennsylvania Amish have a very high frequency of an unusual allele that results in short arms and legs and extra fingers. This high frequency is thought to be the result of:

Correct Answer
verified

If the tallest and shortest individuals of a population of humans do not survive and reproduce as well as the individuals of "average" height, which type of selection would most likely result?

Correct Answer
verified

Which of the following can evolve?

Correct Answer
verified

The 30,000 elephant seals alive today are genetically very similar due to:

Correct Answer
verified

Organisms that have the greatest reproductive success are considered the most evolutionarily fit. True or False?

Correct Answer
verified

An allele frequency is:

Correct Answer
verified

Imagine a population of monkeys in South America whose habitat has been reduced to the point where only 20 individuals survive. This is an example of:

Correct Answer
verified

Based on the information shown in the figure, what do you predict the fourth generation will look like?

Correct Answer
verified

Which of the following can affect a small, endangered population so severely that it goes extinct?

Correct Answer
verified

In a single family, the parents have brown eyes but all five of their children have green eyes. This is an example of evolution. True or False?

Correct Answer
verified

The use of antibiotics caused the mutation that produced MRSA. True or False?

Correct Answer
verified

In hamsters, the dominant allele B codes for a black coat and the recessive allele b codes for a brown coat. In the population shown in the figure above, what is the most frequent phenotype?

Correct Answer
verified

Correct Answer
verified

Imagine that one of the original four mice that escape from a research lab is blind due to a genetic defect. If the mice breed and most of the mice born in subsequent generations are blind from birth, this is most likely a case of:

Correct Answer
verified

Which trait is the BEST example of an adaptation?

Correct Answer
verified

Exam 15: How Populations Evolve

Having greater evolutionary fitness means:

Correct AnswerverifiedShow Answer

From an evolutionary point of view, what important process occurs when a young male baboon leaves the troop that he was born in to join another troop?

Correct AnswerverifiedShow Answer

Evolution can be defined as change in ________ in a population.

Correct AnswerverifiedShow Answer

The interaction of genes and environment produces a specific:

Correct AnswerverifiedShow Answer

A population with ________ is at risk for extinction.

Correct Answerverifiedlimited ge...View AnswerShow Answer

The Pennsylvania Amish have a very high frequency of an unusual allele that results in short arms and legs and extra fingers. This high frequency is thought to be the result of:

Correct AnswerverifiedShow Answer

If the tallest and shortest individuals of a population of humans do not survive and reproduce as well as the individuals of "average" height, which type of selection would most likely result?

Correct AnswerverifiedShow Answer

Which of the following can evolve?

Correct AnswerverifiedShow Answer

The 30,000 elephant seals alive today are genetically very similar due to:

Correct AnswerverifiedShow Answer

Organisms that have the greatest reproductive success are considered the most evolutionarily fit. True or False?

Correct AnswerverifiedShow Answer

An allele frequency is:

Correct AnswerverifiedShow Answer

Imagine a population of monkeys in South America whose habitat has been reduced to the point where only 20 individuals survive. This is an example of:

Correct AnswerverifiedShow Answer

Based on the information shown in the figure, what do you predict the fourth generation will look like?

Correct AnswerverifiedShow Answer

Which of the following can affect a small, endangered population so severely that it goes extinct?

Correct AnswerverifiedShow Answer

In a single family, the parents have brown eyes but all five of their children have green eyes. This is an example of evolution. True or False?

Correct AnswerverifiedShow Answer

The use of antibiotics caused the mutation that produced MRSA. True or False?

Correct AnswerverifiedShow Answer

In hamsters, the dominant allele B codes for a black coat and the recessive allele b codes for a brown coat. In the population shown in the figure above, what is the most frequent phenotype?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Imagine that one of the original four mice that escape from a research lab is blind due to a genetic defect. If the mice breed and most of the mice born in subsequent generations are blind from birth, this is most likely a case of:

Correct AnswerverifiedShow Answer

Which trait is the BEST example of an adaptation?

Correct AnswerverifiedShow Answer

Correct Answer
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verified
limited ge...
View Answer

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