Question 1

Choose the most appropriate letter for each.
-q2

Accepted Answer

A) a reference point that implies stability of gene frequencies through generations 
B) a hallmark is reproductive isolation from other groups 
C) the genes of an entire population 
D) the frequency of homozygous dominants in a population 
E) the frequencies of dominant and recessive alleles in a population
F)the frequency of heterozygotes in a population
G)the frequency of homozygous recessives in a population
H)selection that occurs in environments favorable to heterozygotes
I)results in pesticide-resistant pests 
A) a reference point that implies stability of gene frequencies through generations 
B) a hallmark is reproductive isolation from other groups 
C) the genes of an entire population 
D) the frequency of homozygous dominants in a population 
E) the frequencies of dominant and recessive alleles in a population
F)the frequency of heterozygotes in a population
G)the frequency of homozygous recessives in a population
H)selection that occurs in environments favorable to heterozygotes
I)results in pesticide-resistant pests

Question 2

What can result in speciation within a few generations?

Accepted Answer

A)  Development of a physical barrier 
B)  Polyploidy arising in a plant species 
C)  Postzygotic isolating mechanisms 
D)  Change in environmental conditions 
E)  The introduction of a new predator into an area 
A)  Development of a physical barrier 
B)  Polyploidy arising in a plant species 
C)  Postzygotic isolating mechanisms 
D)  Change in environmental conditions 
E)  The introduction of a new predator into an area

Question 3

Mutations are the original source of new alleles,but may be adaptive,__________ or __________.

Accepted Answer

lethal; ne

Question 4

Which of the following describes a reduction in genetic diversity when a new population is established by migrants?

Accepted Answer

A)  Founder effect 
B)  Genetic drift 
C)  Inbreeding 
D)  Gene flow 
E)  Bottlenecks 
A)  Founder effect 
B)  Genetic drift 
C)  Inbreeding 
D)  Gene flow 
E)  Bottlenecks

Question 5

Four of the following characterize a population in genetic equilibrium.Which one is the exception?

Accepted Answer

A)  Large population size 
B)  No mutations 
C)  Differential reproduction 
D)  Absence of gene flow 
E)  Random mating 
A)  Large population size 
B)  No mutations 
C)  Differential reproduction 
D)  Absence of gene flow 
E)  Random mating

Question 6

All of the following are examples of phenotypic traits except

Accepted Answer

A)  morphology. 
B)  physiology. 
C)  sexual behavior. 
D)  mutations. 
E)  response to stimuli 
A)  morphology. 
B)  physiology. 
C)  sexual behavior. 
D)  mutations. 
E)  response to stimuli

Question 7

The persistence of the sickle-cell anemia allele in some African populations is the result of ____.

Accepted Answer

A)  a high rate of mutation of the normal allele to the sickle-cell anemia allele 
B)  the advantage conferred by the heterozygous form when malaria is prevalent 
C)  nonrandom mating 
D)  a decline in the occurrence of malaria in Africa 
E)  genetic drift 
A)  a high rate of mutation of the normal allele to the sickle-cell anemia allele 
B)  the advantage conferred by the heterozygous form when malaria is prevalent 
C)  nonrandom mating 
D)  a decline in the occurrence of malaria in Africa 
E)  genetic drift

Question 8

Emergence of a new species is known as _______.

Accepted Answer

A)  adaptive radiation 
B)  inbreeding 
C)  reproductive isolation 
D)  speciation 
E)  coevolution 
A)  adaptive radiation 
B)  inbreeding 
C)  reproductive isolation 
D)  speciation 
E)  coevolution

Question 9

For the following statements, select the best choice of the four evolutionary processes listed below.
-The reduced expression of one phenotype in comparison to another in the next generation is an example of this.

Accepted Answer

A) Mutation 
B) gene flow 
C) genetic drift 
D) natural selection 
A) Mutation 
B) gene flow 
C) genetic drift 
D) natural selection

Question 10

The sharp reduction of the gene pool and the numbers of a population through a severe epidemic is an example of ____.

Accepted Answer

A)  natural selection 
B)  genetic isolation 
C)  the bottleneck effect 
D)  the founder effect 
E)  the wild card effect 
A)  natural selection 
B)  genetic isolation 
C)  the bottleneck effect 
D)  the founder effect 
E)  the wild card effect

Question 11

Figure 17.3
  
-If the population of flowers illustrated in the accompanying Punnett square is in genetic equilibrium,the frequency of the homozygous dominant genotype in the new generation will be ____.

Accepted Answer

A)  p2 
B)  2pq 
C)  p2 + q2 
D)  q2 
E)  p2 + 2pq 
A)  p2 
B)  2pq 
C)  p2 + q2 
D)  q2 
E)  p2 + 2pq

Question 12

Speciation that occurs in bird populations that nest on either side of a river could be an example of ________speciation.

Accepted Answer

A)  divergent 
B)  parapatric 
C)  allopatric 
D)  convergent 
E)  sympatric 
A)  divergent 
B)  parapatric 
C)  allopatric 
D)  convergent 
E)  sympatric

Question 13

With __________ speciation,populations in physical contact speciate.

Accepted Answer

The answer of With __________ speciation,populations in physical contact speciate....

Question 14

Individuals of a(n)__________ share a gene pool.

Accepted Answer

The answer of Individuals of a(n)__________ share a gene pool....

Question 15

Which of the following is the best definition of sympatric speciation?

Accepted Answer

A)  Species that evolve due to geographical distance 
B)  Mechanical isolation acts to prevent speciation 
C)  Breeding behavior that prevents the organisms from breeding due to differences in their breeding time 
D)  Ecological isolation 
E)  Divergence within a population leads to speciation in the absence of a physical barrier to gene flow. 
A)  Species that evolve due to geographical distance 
B)  Mechanical isolation acts to prevent speciation 
C)  Breeding behavior that prevents the organisms from breeding due to differences in their breeding time 
D)  Ecological isolation 
E)  Divergence within a population leads to speciation in the absence of a physical barrier to gene flow.

Question 16

__________ occurs when two species act as agents of selection upon one another.

Accepted Answer

The answer of __________ occurs when two species act as...

Question 17

Reproductive isolation is marked by the __________ of gene flow between populations.

Accepted Answer

The answer of Reproductive isolation is marked by the __________...

Question 18

For the following statements, select the best choice of the four evolutionary processes listed below.
-This process produces new genetic variation within a species.

Accepted Answer

A) Mutation 
B) gene flow 
C) genetic drift 
D) natural selection 
A) Mutation 
B) gene flow 
C) genetic drift 
D) natural selection

Question 19

Deviations from __________ indicate that a population is evolving.

Accepted Answer

The answer of Deviations from __________ indicate that a population...

Question 20

In __________ speciation,a geographic barrier interrupts gene flow between populations.

Accepted Answer

The answer of In __________ speciation,a geographic barrier interrupts gene...

Exam 17: Processes of Evolution

Choose the most appropriate letter for each. -q2

What can result in speciation within a few generations?

Mutations are the original source of new alleles,but may be adaptive,__________ or __________.

Which of the following describes a reduction in genetic diversity when a new population is established by migrants?

Four of the following characterize a population in genetic equilibrium.Which one is the exception?

All of the following are examples of phenotypic traits except

The persistence of the sickle-cell anemia allele in some African populations is the result of ____.

Emergence of a new species is known as _______.

For the following statements, select the best choice of the four evolutionary processes listed below. -The reduced expression of one phenotype in comparison to another in the next generation is an example of this.

The sharp reduction of the gene pool and the numbers of a population through a severe epidemic is an example of ____.

Figure 17.3 -If the population of flowers illustrated in the accompanying Punnett square is in genetic equilibrium,the frequency of the homozygous dominant genotype in the new generation will be ____.

Speciation that occurs in bird populations that nest on either side of a river could be an example of ________speciation.

With __________ speciation,populations in physical contact speciate.

Individuals of a(n)__________ share a gene pool.

Which of the following is the best definition of sympatric speciation?

__________ occurs when two species act as agents of selection upon one another.

Reproductive isolation is marked by the __________ of gene flow between populations.

For the following statements, select the best choice of the four evolutionary processes listed below. -This process produces new genetic variation within a species.

Deviations from __________ indicate that a population is evolving.

In __________ speciation,a geographic barrier interrupts gene flow between populations.

Invitation to Biology

Life's Chemical Bases

Molecules of Life

Cell Structure

Ground Rules of Metabolism

Where it Starts—Photosynthesis

How Cells Release Chemical Energy

DNA Structure and Function

From DNA to Protein

Control of Gene Expression

How Cells Reproduce

Meiosis and Sexual Reproduction

Observing Patterns in Inherited Traits

Chromosomes and Human Inheritance

Studying and Manipulating Genomes

Evidence of Evolution

Organizing Information about Species

Life's Origin and Early Evolution

Viruses, Bacteria, and Archaea

Protists: The Simplest Eukaryotes

The Land Plants

Fungi

Animal Evolution: The Invertebrates

Animal Evolution: The Chordates

Human Evolution

Plant Tissues

Plant Nutrition and Transport

Life Cycles of Flowering Plants

Communication Strategies in Plants

Animal Tissues and Organ Systems

Neural Control

Sensory Perception

Endocrine Control

Structural Support and Movement

Circulation

Immunity

Respiration

Digestion and Nutrition

Maintaining the Internal Environment

Animal Reproductive System

Animal Development

Animal Behavior

Population Ecology

Community Ecology

Ecosystems

The Biosphere

Human Impacts on the Biosphere

Filters

Mutations are the original source of new alleles,but may be adaptive, or .