Question 1

What would a change of environmental conditions most likely cause in an existing species?

Accepted Answer

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

Question 2

Genetic variation can originate both from the production of new alleles and from the arrangement of existing alleles.

Accepted Answer

A) True 
 B)False  True

Question 3

People with the disease known as sickle cell anemia are often better able to survive malaria. What is the cause of this?

Accepted Answer

A)  balanced polymorphism 
B)  heterozygote advantage 
C)  disruptive selection 
D)  stabilizing selection 
A)  balanced polymorphism 
B)  heterozygote advantage 
C)  disruptive selection 
D)  stabilizing selection B

Question 4

What is inbreeding primarily due to?

Accepted Answer

A)  migration 
B)  non-random mating 
C)  mutation 
D)  adaptive radiation 
A)  migration 
B)  non-random mating 
C)  mutation 
D)  adaptive radiation

Question 5

The distribution of the genetic disorder called sickle cell anemia is correlated with the distribution of malaria in tropical countries. What is this an example of?

Accepted Answer

A)  heterozygote advantage 
B)  a genetic bottleneck 
C)  genetic drift 
D)  evolutionary convergence 
A)  heterozygote advantage 
B)  a genetic bottleneck 
C)  genetic drift 
D)  evolutionary convergence

Question 6

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 7

Under what circumstance might measuring the frequency of homozygous recessive genotypes lead to erroneous predictions of allele frequencies in a population?

Accepted Answer

A)  The population is under Hardy-Weinberg equilibrium. 
B)  The population is affected by heterozygote advantage. 
C)  The population has undergone genetic drift in the past. 
D)  The population is affected by homozygote advantage. 
A)  The population is under Hardy-Weinberg equilibrium. 
B)  The population is affected by heterozygote advantage. 
C)  The population has undergone genetic drift in the past. 
D)  The population is affected by homozygote advantage.

Question 8

Which process below is NOT a component of natural selection?

Accepted Answer

A)  genetic drift 
B)  overproduction of offspring 
C)  limitations in vital resources 
D)  genetic variation 
A)  genetic drift 
B)  overproduction of offspring 
C)  limitations in vital resources 
D)  genetic variation

Question 9

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

Accepted Answer

A) True 
 B)False

Question 10

Match the Hardy-Weinberg factor with the correct genetic designation.
-p

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 11

In an unchanging environment, a well-adapted population is likely to experience no natural selection of any kind.

Accepted Answer

A) True 
 B)False

Question 12

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 13

A population bottleneck results in decreased genetic diversity and often the loss of rare alleles.

Accepted Answer

A) True 
 B)False

Question 14

How does gene flow introduce novel genetic variants into populations?

Accepted Answer

When an individual or gamete from one po

Question 15

There are two alleles for a gene in a population, and the frequency of the dominant allele (p) is 0.50. What is the frequency of the recessive allele (q)?

Accepted Answer

A)  0.05 
B)  0.25 
C)  0.50 
D)  0.75 
A)  0.05 
B)  0.25 
C)  0.50 
D)  0.75

Question 16

If individuals move from one population to another, it may cause a shift in allele frequencies. What causes this shift?

Accepted Answer

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

Question 17

Match the Hardy-Weinberg factor with the correct genetic designation.
-q2

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 18

Which of the following is NOT a condition for genetic equilibrium?

Accepted Answer

A)  The population is not migratory to other populations. 
B)  The population is closed to migration from other populations. 
C)  The population is infinite in size. 
D)  The population is small in size. 
A)  The population is not migratory to other populations. 
B)  The population is closed to migration from other populations. 
C)  The population is infinite in size. 
D)  The population is small in size.

Question 19

Mutations are random and create genetic novelty.

Accepted Answer

A) True 
 B)False

Question 20

What is the founder effect a type of?

Accepted Answer

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

Exam 17: Microevolution: Changes Within Populations

What would a change of environmental conditions most likely cause in an existing species?

Genetic variation can originate both from the production of new alleles and from the arrangement of existing alleles.

People with the disease known as sickle cell anemia are often better able to survive malaria. What is the cause of this?

What is inbreeding primarily due to?

The distribution of the genetic disorder called sickle cell anemia is correlated with the distribution of malaria in tropical countries. What is this an example of?

Which process below is NOT an agent of microevolutionary change?

Under what circumstance might measuring the frequency of homozygous recessive genotypes lead to erroneous predictions of allele frequencies in a population?

Which process below is NOT a component of natural selection?

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

Match the Hardy-Weinberg factor with the correct genetic designation. -p

In an unchanging environment, a well-adapted population is likely to experience no natural selection of any kind.

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

A population bottleneck results in decreased genetic diversity and often the loss of rare alleles.

How does gene flow introduce novel genetic variants into populations?

There are two alleles for a gene in a population, and the frequency of the dominant allele (p) is 0.50. What is the frequency of the recessive allele (q)?

If individuals move from one population to another, it may cause a shift in allele frequencies. What causes this shift?

Match the Hardy-Weinberg factor with the correct genetic designation. -q2

Which of the following is NOT a condition for genetic equilibrium?

Mutations are random and create genetic novelty.

What is the founder effect a type of?

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

Filters

Match the Hardy-Weinberg factor with the correct genetic designation. -q²