Question 1

In fish undergoing sexual selection, females are more likely to mate with males lacking coloration because brightly colored males are more visible to predators.

Accepted Answer

A) True 
 B)False

Question 2

The occurrence of mutation is directed toward a specific goal.

Accepted Answer

A) True 
 B)False

Question 3

"Emigration" is the term that describes one or more individuals leaving their home population. Is the effect of emigration likely to have a greater genetic effect if the home population was large, or if the home population was small?

Accepted Answer

A)  large, because this is an example of disruptive selection 
B)  large, because natural selection will cause a bottleneck to occur in the remaining individuals 
C)  small, because the loss of just a few individuals may greatly reduce the remaining genetic variation 
D)  small, because the remaining individuals will no longer be able to practice nonrandom mating 
A)  large, because this is an example of disruptive selection 
B)  large, because natural selection will cause a bottleneck to occur in the remaining individuals 
C)  small, because the loss of just a few individuals may greatly reduce the remaining genetic variation 
D)  small, because the remaining individuals will no longer be able to practice nonrandom mating

Question 4

Which of the following statements concerning evolution is false?

Accepted Answer

A)  Natural selection requires variation in the population. 
B)  An individual that is better adapted than others in a population will always be more reproductively successful. 
C)  Genetic drift causes little evolutionary change in large populations. 
D)  Evolution involves a change of frequency of alleles in the gene pool. 
A)  Natural selection requires variation in the population. 
B)  An individual that is better adapted than others in a population will always be more reproductively successful. 
C)  Genetic drift causes little evolutionary change in large populations. 
D)  Evolution involves a change of frequency of alleles in the gene pool.

Question 5

What is genetic drift?

Accepted Answer

A)  gene mutation within, or between, populations 
B)  chance evolutionary change occurring in small populations 
C)  natural selection acting on large populations 
D)  shifts in allelic frequencies due to mutation 
A)  gene mutation within, or between, populations 
B)  chance evolutionary change occurring in small populations 
C)  natural selection acting on large populations 
D)  shifts in allelic frequencies due to mutation

Question 6

_______ are the original source of genetic variation within a population.

Accepted Answer

The answer of _______ are the original source of genetic...

Question 7

Genetic drift causes random changes in _______ frequency.

Accepted Answer

The answer of Genetic drift causes random changes in _______...

Question 8

Two populations of geese live near each other. As time passes, the populations are becoming more genetically alike. This is probably due to gene _______.

Accepted Answer

The answer of Two populations of geese live near each...

Question 9

Does sexual reproduction alone necessarily cause evolution?

Accepted Answer

A)  Yes, sexual reproduction causes genetic drift. 
B)  Yes, sexual reproduction is the only source of new heritable mutations. 
C)  No, sexual reproduction creates variation, but evolution may or may not act on that variation. 
D)  No, sexual reproduction produces new combinations of alleles that are never subject to natural selection. 
A)  Yes, sexual reproduction causes genetic drift. 
B)  Yes, sexual reproduction is the only source of new heritable mutations. 
C)  No, sexual reproduction creates variation, but evolution may or may not act on that variation. 
D)  No, sexual reproduction produces new combinations of alleles that are never subject to natural selection.

Question 10

If p is the frequency of the W allele in a population, why do we equate the WW individuals with the p² portion of the Hardy-Weinberg equation?

Accepted Answer

A)  The Hardy-Weinberg equation describes the frequencies of dominant alleles only. 
B)  The WW individuals have two copies of the allele represented by p. 
C)  The ww individuals are all killed by lethal recessive genes. 
D)  The frequency of p is always equal to the frequency of q. 
A)  The Hardy-Weinberg equation describes the frequencies of dominant alleles only. 
B)  The WW individuals have two copies of the allele represented by p. 
C)  The ww individuals are all killed by lethal recessive genes. 
D)  The frequency of p is always equal to the frequency of q.

Question 11

If a given population has 30 RR individuals, 10 Rr individuals, and 10 rr individuals, what is the genotype frequency of Rr?

Accepted Answer

A)  0.10 
B)  0.20 
C)  0.30 
D)  0.50 
A)  0.10 
B)  0.20 
C)  0.30 
D)  0.50

Question 12

Which of the following is an example of gene flow?

Accepted Answer

A)  Pollen from a population A plant lands on the same plant (mating with itself). 
B)  Pollen from a population A plant lands on another population A plant. 
C)  Pollen from a population A plant lands on a population B plant. 
D)  Pollen from a population B plant lands on a population B plant. 
A)  Pollen from a population A plant lands on the same plant (mating with itself). 
B)  Pollen from a population A plant lands on another population A plant. 
C)  Pollen from a population A plant lands on a population B plant. 
D)  Pollen from a population B plant lands on a population B plant.

Question 13

While on a camping trip, you collect some white tadpoles from a pond and take them home. The tadpoles develop into white bullfrogs. When the frogs get too big, you release them into a local pond. The next year, several white bullfrogs are observed in the pond. This is an example of

Accepted Answer

A)  genetic drift. 
B)  natural selection. 
C)  gene flow. 
D)  sexual selection. 
A)  genetic drift. 
B)  natural selection. 
C)  gene flow. 
D)  sexual selection.

Question 14

In many cases of ____________ selection, mates are chosen based on physical features or behaviors rather than fitness.

Accepted Answer

The answer of In many cases of ____________ selection, mates...

Question 15

Which of the following is not a mode of natural selection?

Accepted Answer

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

Question 16

Examine the graph below.
   
The shape of this graph indicates that birth weight in human babies is an example of _____________ selection.

Accepted Answer

The answer of Examine the graph below.
   
The...

Question 17

Recombination usually reverses the effects of a mutation.

Accepted Answer

A) True 
 B)False

Question 18

Allele frequency refers to the rate of mutation in a population.

Accepted Answer

A) True 
 B)False

Question 19

Disruptive selection operates whenever

Accepted Answer

A)  natural selection is disrupted by genetic drift. 
B)  there is a balanced gene pool. 
C)  only the smallest individuals survive. 
D)  the extremes in a distribution of phenotypes survive better than the average of a distribution. 
A)  natural selection is disrupted by genetic drift. 
B)  there is a balanced gene pool. 
C)  only the smallest individuals survive. 
D)  the extremes in a distribution of phenotypes survive better than the average of a distribution.

Question 20

What is the total number of alleles for the T gene present in a population of 100 individuals?

Accepted Answer

A)  50 
B)  100 
C)  200 
D)  400 
A)  50 
B)  100 
C)  200 
D)  400

Exam 17: Evolution of Populations

In fish undergoing sexual selection, females are more likely to mate with males lacking coloration because brightly colored males are more visible to predators.

The occurrence of mutation is directed toward a specific goal.

"Emigration" is the term that describes one or more individuals leaving their home population. Is the effect of emigration likely to have a greater genetic effect if the home population was large, or if the home population was small?

Which of the following statements concerning evolution is false?

What is genetic drift?

_______ are the original source of genetic variation within a population.

Genetic drift causes random changes in _______ frequency.

Two populations of geese live near each other. As time passes, the populations are becoming more genetically alike. This is probably due to gene _______.

Does sexual reproduction alone necessarily cause evolution?

If p is the frequency of the W allele in a population, why do we equate the WW individuals with the p² portion of the Hardy-Weinberg equation?

If a given population has 30 RR individuals, 10 Rr individuals, and 10 rr individuals, what is the genotype frequency of Rr?

Which of the following is an example of gene flow?

While on a camping trip, you collect some white tadpoles from a pond and take them home. The tadpoles develop into white bullfrogs. When the frogs get too big, you release them into a local pond. The next year, several white bullfrogs are observed in the pond. This is an example of

In many cases of ____________ selection, mates are chosen based on physical features or behaviors rather than fitness.

Which of the following is not a mode of natural selection?

Examine the graph below. The shape of this graph indicates that birth weight in human babies is an example of _____________ selection.

Recombination usually reverses the effects of a mutation.

Allele frequency refers to the rate of mutation in a population.

Disruptive selection operates whenever

What is the total number of alleles for the T gene present in a population of 100 individuals?

The Nature of Science and the Characteristics of Life

Organizing the Diversity of Life

Major Groups of Living Organisms

Chemical Building Blocks

Cell Structure and Internal Compartments

Cell Membranes, Transport, and Communication

Energy and Enzymes

Photosynthesis and Cellular Respiration

Cell Division

Patterns of Inheritance

Chromosomes and Human Genetics

DNA

From Gene to Protein

Control of Gene Expression

DNA Technology

How Evolution Works

Adaptation and Speciation

The Evolutionary History of Life

Maintaining the Internal Environment

Animal Nutrition and Digestion

Gas Exchange

The Circulatory System

Animal Hormones

The Nervous System

Sensing the Environment

Skeletons, Muscles, and Movement

Defenses against Disease

Reproduction and Development

Animal Behavior

Plant Structure, Nutrition, and Transport

Plant Growth and Reproduction

The Biosphere

Growth of Populations

Interactions among Organisms

Communities of Organisms

Ecosystems

Global Change

Biodiversity and People

Cancer: Cell Division Out of Control

Harnessing the Human Genome

Humans and Evolution

Smoking--Beyond Lung Cancer

Feeding a Hungry Planet

Building a Sustainable Society

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