Question 1

Which of the following processes listed below will NOT disrupt Hardy-Weinberg equilibrium?

Accepted Answer

A)  non-random mating 
B)  natural selection 
C)  migration 
D)  punctuated equilibrium 
A)  non-random mating 
B)  natural selection 
C)  migration 
D)  punctuated equilibrium

Question 2

According to the modern synthetic theory of evolution, what does the accumulation of mutations over time result in?

Accepted Answer

A)  microevolution 
B)  adaptation 
C)  an increase in genetic variation 
D)  speciation 
A)  microevolution 
B)  adaptation 
C)  an increase in genetic variation 
D)  speciation

Question 3

The reason why some specialty breeds of dogs are more prone to genetic disease is because of genetic drift.

Accepted Answer

A) True 
 B)False

Question 4

If you wanted to calculate the frequencies of the two different alleles for a particular gene in a population, what data would you have to gather and how would you use it?

Accepted Answer

You would have to sample the population

Question 5

What is the stable presence of more than one allele for a particular gene in a population called?

Accepted Answer

A)  balanced polymorphism 
B)  mixed gene pool 
C)  mutation pressure 
D)  genetic drift 
A)  balanced polymorphism 
B)  mixed gene pool 
C)  mutation pressure 
D)  genetic drift

Question 6

How can organisms with the same phenotype have different genotypes, and vice versa? What is the significance of this?

Accepted Answer

Phenotypic variation can be caused by ge

Question 7

If you were planning the colonization of a distant planet, what would you do to ensure that the population remained genetically healthy for a long time?

Accepted Answer

To avoid genetic drift and the occurrenc

Question 8

All the population attributes listed below can be calculated with the Hardy-Weinberg equation EXCEPT which one?

Accepted Answer

A)  the frequency of heterozygotes 
B)  the frequency of a dominant allele 
C)  the frequency of a recessive allele 
D)  the frequency of mutation 
A)  the frequency of heterozygotes 
B)  the frequency of a dominant allele 
C)  the frequency of a recessive allele 
D)  the frequency of mutation

Question 9

Which of the following best explains variation that approximates a bell-shaped curve when plotted on a bar graph?

Accepted Answer

A)  The variation is undergoing disruptive selection. 
B)  The variation is undergoing stabilizing selection. 
C)  The variation is quantitative. 
D)  The variation is qualitative. 
A)  The variation is undergoing disruptive selection. 
B)  The variation is undergoing stabilizing selection. 
C)  The variation is quantitative. 
D)  The variation is qualitative.

Question 10

What is the decline in the occurrence of sickle cell anemia in the American population most likely the result of?

Accepted Answer

A)  a lower mutation rate in the United States than in Africa 
B)  the advantage of both homozygous forms over the heterozygous form 
C)  the development of appropriate medical treatment for the sickle cell condition in the United States 
D)  a decline in the occurrence of malaria in the United States 
A)  a lower mutation rate in the United States than in Africa 
B)  the advantage of both homozygous forms over the heterozygous form 
C)  the development of appropriate medical treatment for the sickle cell condition in the United States 
D)  a decline in the occurrence of malaria in the United States

Question 11

We are sending a small number of dogs to colonize a new planet. Through a random selection process, we end up only with dachshunds and Chihuahuas. The subsequent colony is all small dogs with short legs. What is this an example of?

Accepted Answer

A)  adaptive radiation 
B)  punctuated equilibrium 
C)  genetic drift 
D)  microevolution 
A)  adaptive radiation 
B)  punctuated equilibrium 
C)  genetic drift 
D)  microevolution

Question 12

Match each of the following definitions with the correct agent.
-choice of mates based on their phenotypes and genotypes

Accepted Answer

A) gene flow 
B) non-random mating 
C) genetic drift 
D) mutation 
E) natural selection 
A) gene flow 
B) non-random mating 
C) genetic drift 
D) mutation 
E) natural selection

Question 13

What does a sudden reduction in population size generally result in?

Accepted Answer

A)  extinction 
B)  mutation 
C)  speciation 
D)  genetic drift 
A)  extinction 
B)  mutation 
C)  speciation 
D)  genetic drift

Question 14

What is the production of random evolutionary changes in small breeding populations known as?

Accepted Answer

A)  gene flow 
B)  genetic drift 
C)  disruptive selection 
D)  mutation 
A)  gene flow 
B)  genetic drift 
C)  disruptive selection 
D)  mutation

Question 15

If the frequency of the recessive allele (q) for a particular two-allele gene in a population is 0.20, what percentage of the individuals in the population will be heterozygotes for that gene?

Accepted Answer

A)  0.16 
B)  0.20 
C)  0.32 
D)  0.80 
A)  0.16 
B)  0.20 
C)  0.32 
D)  0.80

Question 16

In an isolated population of fruit flies, 4% of the individuals have pink eyes, a homozygous recessive condition, and 96% have the dominant black eye phenotype. What percentage of the population are heterozygotes?

Accepted Answer

A)  4% 
B)  16% 
C)  32% 
D)  48% 
A)  4% 
B)  16% 
C)  32% 
D)  48%

Question 17

For which of the following is the Hardy-Weinberg formula valuable?

Accepted Answer

A)  calculating changes in population size 
B)  calculating changes in speciation 
C)  calculating changes in allele frequencies 
D)  calculating changes in mutation 
A)  calculating changes in population size 
B)  calculating changes in speciation 
C)  calculating changes in allele frequencies 
D)  calculating changes in mutation

Question 18

What is the one measurement we have to make if we want to know the percentage of particular genotypes within an actual population, assuming complete dominance and two alleles?

Accepted Answer

A)  the frequency of heterozygous phenotypes 
B)  the frequency of heterozygous genotypes 
C)  the frequency of dominant phenotypes 
D)  the frequency of recessive phenotypes 
A)  the frequency of heterozygous phenotypes 
B)  the frequency of heterozygous genotypes 
C)  the frequency of dominant phenotypes 
D)  the frequency of recessive phenotypes

Question 19

Which of the following is the source of new alleles in a population?

Accepted Answer

A)  natural selection 
B)  mutation 
C)  microevolution 
D)  genetic drift 
A)  natural selection 
B)  mutation 
C)  microevolution 
D)  genetic drift

Question 20

Natural selection quickly eliminates harmful alleles from the population.

Accepted Answer

A) True 
 B)False

Exam 17: Microevolution: Changes Within Populations

Which of the following processes listed below will NOT disrupt Hardy-Weinberg equilibrium?

According to the modern synthetic theory of evolution, what does the accumulation of mutations over time result in?

The reason why some specialty breeds of dogs are more prone to genetic disease is because of genetic drift.

If you wanted to calculate the frequencies of the two different alleles for a particular gene in a population, what data would you have to gather and how would you use it?

What is the stable presence of more than one allele for a particular gene in a population called?

How can organisms with the same phenotype have different genotypes, and vice versa? What is the significance of this?

If you were planning the colonization of a distant planet, what would you do to ensure that the population remained genetically healthy for a long time?

All the population attributes listed below can be calculated with the Hardy-Weinberg equation EXCEPT which one?

Which of the following best explains variation that approximates a bell-shaped curve when plotted on a bar graph?

What is the decline in the occurrence of sickle cell anemia in the American population most likely the result of?

We are sending a small number of dogs to colonize a new planet. Through a random selection process, we end up only with dachshunds and Chihuahuas. The subsequent colony is all small dogs with short legs. What is this an example of?

Match each of the following definitions with the correct agent. -choice of mates based on their phenotypes and genotypes

What does a sudden reduction in population size generally result in?

What is the production of random evolutionary changes in small breeding populations known as?

If the frequency of the recessive allele (q) for a particular two-allele gene in a population is 0.20, what percentage of the individuals in the population will be heterozygotes for that gene?

In an isolated population of fruit flies, 4% of the individuals have pink eyes, a homozygous recessive condition, and 96% have the dominant black eye phenotype. What percentage of the population are heterozygotes?

For which of the following is the Hardy-Weinberg formula valuable?

What is the one measurement we have to make if we want to know the percentage of particular genotypes within an actual population, assuming complete dominance and two alleles?

Which of the following is the source of new alleles in a population?

Natural selection quickly eliminates harmful alleles from the population.

Light and Life

The Cell: an Overview

Energy and Enzymes

Cell Membranes and Signaling

Cellular Respiration

Photosynthesis

Cell Cycles

Genetic Recombination

The Chromosomal Basis of Mendelian Inheritance

Genetic Linkage, Sex-Linkage, and Other Non-Mendelian Inheritance Mechanisms

DNA Structure, Replication, and Repair

Gene Structure Expression, and Mutation

Regulation of Gene Expression

Dna Technologies

Genomes

Evolution: the Development of the Theory

Speciation and Macroevolution

Systematics and Phylogenetics: Revealing the Tree of Life

Humans and Evolution

Defining Life and Its Origins

Viruses, Viroids, and Prions: Infectious Biological Particles

Bacteria and Archaea

Protists

Fungi

Plants

Animals

Conservation of Biodiversity

Population Ecology

Species Interactions and Community Ecology

Ecosystems

Animal Behaviour

Organization of the Plant Body

Transport in Plants

Reproduction and Development in Flowering Plants

Plant Nutrition

Plant Signals and Responses to the Environment

Introduction to Animal Organization and Physiology

Animal Nutrition

Gas Exchange: the Respiratory System

Internal Transport: the Circulatory System

Regulation of the Internal Environment: Water, Solutes, and Temperature

Control of Animal Processes: Endocrine Control

Animal Reproduction

Control of Animal Processes: Neural Control

Muscles, Skeletons, and Body Movements

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