Question 1

In which of the following sexually reproducing populations does the Hardy-Weinberg principle of genetic equilibrium tell us what to expect?

Accepted Answer

A) in a population that is decreasing with each generation 
B) in a population that is increasing with each generation 
C) in a population that is evolving 
D) in a population that is not evolving 
A) in a population that is decreasing with each generation 
B) in a population that is increasing with each generation 
C) in a population that is evolving 
D) in a population that is not evolving D

Question 2

Genetic drift is non-selective and therefore does not contribute to microevolution.

Accepted Answer

A) True 
 B)False  False

Question 3

What is balanced polymorphism in a population likely the result of?

Accepted Answer

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

Question 4

Match the Hardy-Weinberg factor with the correct genetic designation.
-2pq

Accepted Answer

A) frequency of heterozygotes 
B) frequency of the dominant allele 
C) frequency of the recessive allele 
D) the total gene pool for a gene with two alleles 
E) frequency of homozygous recessive genotypes
F)frequency of homozygous dominant genotypes 
A) frequency of heterozygotes 
B) frequency of the dominant allele 
C) frequency of the recessive allele 
D) the total gene pool for a gene with two alleles 
E) frequency of homozygous recessive genotypes
F)frequency of homozygous dominant genotypes

Question 5

Which process below is NOT an agent of microevolutionary change?

Accepted Answer

A) mutation 
B) genetic drift 
C) natural selection 
D) random mating 
A) mutation 
B) genetic drift 
C) natural selection 
D) random mating

Question 6

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 7

Match each of the following definitions with the correct agent.
-random changes in allele frequencies caused by chance events

Accepted Answer

A) gene flow 
B) nonrandom mating 
C) genetic drift 
D) mutation 
E) natural selection 
A) gene flow 
B) nonrandom mating 
C) genetic drift 
D) mutation 
E) natural selection

Question 8

Phenotypic variation CANNOT be passed on from one generation to the next.

Accepted Answer

A) True 
 B)False

Question 9

Imagine that the only survivors of a colony on Venus are a man and a woman, who happen to be both originally from southern Ukraine. Which of the following will their descendants show?

Accepted Answer

A) genetic drift 
B) punctuated equilibrium 
C) excessive mutation 
D) heterozygote advantage 
A) genetic drift 
B) punctuated equilibrium 
C) excessive mutation 
D) heterozygote advantage

Question 10

Which of the following best characterize mutations that confer no apparent selective advantage or disadvantage in a particular environment?

Accepted Answer

A) random mutations 
B) deleterious mutations 
C) neutral mutations 
D) stabilizing mutations 
A) random mutations 
B) deleterious mutations 
C) neutral mutations 
D) stabilizing mutations

Question 11

In a colony of 100 guinea pigs, 16 show the recessive trait of bristly hair. What is the percentage of heterozygotes in the population?

Accepted Answer

A) 24% 
B) 36% 
C) 48% 
D) 52% 
A) 24% 
B) 36% 
C) 48% 
D) 52%

Question 12

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 13

Which of the following is the least likely result of a genetic bottleneck?

Accepted Answer

A) an increase in the frequency of the less common allele 
B) allele frequencies identical to the previous generation 
C) a decrease in the frequency of an uncommon allele 
D) a decrease in the frequency of the most common allele 
A) an increase in the frequency of the less common allele 
B) allele frequencies identical to the previous generation 
C) a decrease in the frequency of an uncommon allele 
D) a decrease in the frequency of the most common allele

Question 14

Which of the following is describing the situation when microevolution takes place?

Accepted Answer

A) when a population experiences a shift in allele frequencies 
B) when a mutation occurs in a population 
C) when several mutations occur in a population 
D) when a population has different forms of the same gene 
A) when a population experiences a shift in allele frequencies 
B) when a mutation occurs in a population 
C) when several mutations occur in a population 
D) when a population has different forms of the same gene

Question 15

Which of the following best describes microevolution?

Accepted Answer

A) the formation of a new species 
B) the occurrence of a new mutation 
C) a change in allele frequencies within a population 
D) the gradual change in the form of fossils over geological time 
A) the formation of a new species 
B) the occurrence of a new mutation 
C) a change in allele frequencies within a population 
D) the gradual change in the form of fossils over geological time

Question 16

Which of the following does directional selection favour?

Accepted Answer

A) intermediate phenotypes 
B) phenotypes at one end of the distribution 
C) phenotypic extremes at both ends 
D) heterozygotes 
A) intermediate phenotypes 
B) phenotypes at one end of the distribution 
C) phenotypic extremes at both ends 
D) heterozygotes

Question 17

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 18

The development of penicillin-resistant bacteria in the twentieth century represents an example of which of the following?

Accepted Answer

A) punctuated equilibrium 
B) speciation 
C) microevolution 
D) mutation 
A) punctuated equilibrium 
B) speciation 
C) microevolution 
D) mutation

Question 19

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) nonrandom mating 
C) genetic drift 
D) mutation 
E) natural selection 
A) gene flow 
B) nonrandom mating 
C) genetic drift 
D) mutation 
E) natural selection

Question 20

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

Exam 18: Microevolution: Changes Within Populations

In which of the following sexually reproducing populations does the Hardy-Weinberg principle of genetic equilibrium tell us what to expect?

Genetic drift is non-selective and therefore does not contribute to microevolution.

What is balanced polymorphism in a population likely the result of?

Match the Hardy-Weinberg factor with the correct genetic designation. -2pq

Which process below is NOT an agent of microevolutionary change?

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?

Match each of the following definitions with the correct agent. -random changes in allele frequencies caused by chance events

Phenotypic variation CANNOT be passed on from one generation to the next.

Imagine that the only survivors of a colony on Venus are a man and a woman, who happen to be both originally from southern Ukraine. Which of the following will their descendants show?

Which of the following best characterize mutations that confer no apparent selective advantage or disadvantage in a particular environment?

In a colony of 100 guinea pigs, 16 show the recessive trait of bristly hair. What is the percentage of heterozygotes in the population?

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

Which of the following is the least likely result of a genetic bottleneck?

Which of the following is describing the situation when microevolution takes place?

Which of the following best describes microevolution?

Which of the following does directional selection favour?

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

The development of penicillin-resistant bacteria in the twentieth century represents an example of which of the following?

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

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

Light and Life

The Cell: an Overview

Defining Life and Its Origins

Energy and Enzymes

Cell Membranes and Signalling

Cellular Respiration

Photosynthesis

Cell Cycles

Genetic Recombination

Mendel, Genes, and Inheritance

Genes, Chromosomes, and Human Genetics

Dna Structure, Replication, and Organization

Gene Structure and Expression

Control of Gene Expression

Dna Technologies

Genomes and Proteomes

Evolution: the Development of the Theory

Species and Macroevolution

Understanding the History of Life on Earth

Humans and Evolution

Bacteria and Archaea

Viruses, Viroids, and Prions: Infectious Biological Particles

Protists

Fungi

Plants

Diversity of Animals 1: Sponges, Radiata, Platyhelminthes, and Protostomes

Diversity of Animals 2: Deuterostomes: Vertebrates and Their Closest Relatives

Population Ecology

Population Interactions and Community Ecology

Ecosystems

Conservation of Biodiversity

Putting Selection to Work

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

Transport in Animals: the Circulatory System

Reproduction in Animals

Animal Development

Control of Animal Processes: Neural Control

Control of Animal Processes: Neural Control

Control of Animal Processes: Neural Integration

Muscles, Skeletons, and Body Movements

Animal Behaviour

Animal Nutrition

Gas Exchange: the Respiratory System

Regulating the Internal Environment

Defences Against Disease

Conservation and Evolutionary Physiology

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