Question 1

A change in allele frequency due to random chance is known as

Accepted Answer

A) inbreeding. 
B) mutation. 
C) migration. 
D) genetic drift. 
A) inbreeding. 
B) mutation. 
C) migration. 
D) genetic drift.

Question 2

A population that is adapted to its unique local environmental conditions is called a(n)

Accepted Answer

A) clinal population. 
B) subspecies. 
C) geographic isolate. 
D) ecotype. 
A) clinal population. 
B) subspecies. 
C) geographic isolate. 
D) ecotype.

Question 3

Phenotypic characteristics that fall into a limited number of discrete categories are considered ________ traits.

Accepted Answer

The answer of Phenotypic characteristics that fall into a limited...

Question 4

List the five conditions for a lack of evolution according to the Hardy-Weinberg principle. Explain how these factors might contribute to population stasis.

Accepted Answer

The five conditions for a lack of evolut

Question 5

The fitness of any phenotype is a function of the prevailing ________ conditions.

Accepted Answer

The answer of The fitness of any phenotype is a...

Question 6

What is the primary original source of genetic variation in a population?

Accepted Answer

A) mutation 
B) genetic drift 
C) blending inheritance 
D) cloning 
A) mutation 
B) genetic drift 
C) blending inheritance 
D) cloning

Question 7

Bacteria may become resistant to an antibiotic via mutation, plasmid transfer, or ________.

Accepted Answer

The answer of Bacteria may become resistant to an antibiotic...

Question 8

Adaptive radiation

Accepted Answer

A) is the mechanism of evolution. 
B) results in new specialized species. 
C) reduces diversity. 
D) is the result of fixed environmental conditions. 
A) is the mechanism of evolution. 
B) results in new specialized species. 
C) reduces diversity. 
D) is the result of fixed environmental conditions.

Question 9

Genes are discrete subunits of chromosomes that form the informational units of the DNA molecule.

Accepted Answer

A) True 
 B)False

Question 10

Changes due to developmental plasticity are reversible.

Accepted Answer

A) True 
 B)False

Question 11

Individual beak size of individual finches of the Galapagos islands

Accepted Answer

A) may change during a bird's lifetime. 
B) will always match the beak size useful for seed foraging. 
C) has nothing to do with overall population characteristics. 
D) will greatly influence individual survival. 
A) may change during a bird's lifetime. 
B) will always match the beak size useful for seed foraging. 
C) has nothing to do with overall population characteristics. 
D) will greatly influence individual survival.

Question 12

The sum of all alleles across all individuals in the population is called the

Accepted Answer

A) phenotype frequency. 
B) gene pool. 
C) allele assemblage. 
D) genetic equilibration. 
A) phenotype frequency. 
B) gene pool. 
C) allele assemblage. 
D) genetic equilibration.

Question 13

A bimodal distribution of a trait in a population is the result of

Accepted Answer

A) stabilizing selection. 
B) natural selection. 
C) directional selection. 
D) disruptive selection. 
A) stabilizing selection. 
B) natural selection. 
C) directional selection. 
D) disruptive selection.

Question 14

Humans have contributed to the prevalence of resistant bacteria by inappropriate use of antibiotics.

Accepted Answer

A) True 
 B)False

Question 15

An allele that completely masks the effect of another allele is considered

Accepted Answer

A) co-dominant. 
B) dominant. 
C) ineffective. 
D) recessive. 
A) co-dominant. 
B) dominant. 
C) ineffective. 
D) recessive.

Exam 5: Ecological Genetics: Adaptation and Natural Selection

A change in allele frequency due to random chance is known as

A population that is adapted to its unique local environmental conditions is called a(n)

Phenotypic characteristics that fall into a limited number of discrete categories are considered ________ traits.

List the five conditions for a lack of evolution according to the Hardy-Weinberg principle. Explain how these factors might contribute to population stasis.

The fitness of any phenotype is a function of the prevailing ________ conditions.

What is the primary original source of genetic variation in a population?

Bacteria may become resistant to an antibiotic via mutation, plasmid transfer, or ________.

Adaptive radiation

Genes are discrete subunits of chromosomes that form the informational units of the DNA molecule.

Changes due to developmental plasticity are reversible.

Individual beak size of individual finches of the Galapagos islands

The sum of all alleles across all individuals in the population is called the

A bimodal distribution of a trait in a population is the result of

Humans have contributed to the prevalence of resistant bacteria by inappropriate use of antibiotics.

An allele that completely masks the effect of another allele is considered

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Predation

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