Question 1

Mutations in DNA found in which cells are MOST likely to have significant evolutionary consequences?

Accepted Answer

A)   sex cells (gametes) 
B)   red blood cells
C)   skin pigment cells
D)   brain cellsE) A) and B)
F) B) and D)

Question 2

In a classroom taste test for PTC the genotype frequency was determined to be P = 0.35 and Q = 0.65.After applying the Hardy-Weinberg equation, the percentage of genotypes was found to be as follows:

Accepted Answer

A)   p2 = 0.12; 2pq = 0.46; q2 = 0.42.
B)   p2 = 0.35; 2pq = 0.00; q2 = 0.65.
C)   p2 = 0.12; 2pq = 0.65; q2 = 0.23.
D)   p2= 0.20; 2pq = 0.20; q2 = 0.60.E) A) and D)
F) A) and B)

Question 3

Australian aborigines are an endogamous society.This means that marriage and reproduction take place within the group, leading to

Accepted Answer

A)   increased genetic diversity through genetic drift.
B)   migration without gene flow.
C)   more genetic diversity than would be observed in an exogamous society.
D)   decreased genetic diversity due to a lack of admixture.E) B) and C)
F) All of the above

Question 4

A genetic study conducted over multiple generations found that the frequency of genotypes in the first generation were AA: 0.36, Aa: 0.48, and aa: 0.16.In the second generation, genotype frequencies shifted to AA: 0.16, Aa: 0.48, and aa: 0.36.According to the Hardy-Weinberg equilibrium, we can assume

Accepted Answer

A)   random mating has altered gene frequencies.
B)   gene flow has possibly shifted the gene frequencies.
C)   mating in this population must be nonrandom mating.
D)   gene flow has possibly shifted the gene frequencies AND mating in this population must be nonrandom mating.E) A) and B)
F) None of the above

Question 5

What effect does natural selection have on population variation?

Accepted Answer

A)   It increases variation.
B)   It decreases variation.
C)   It both increases and decreases variation.
D)   It does not affect variation.E) None of the above
F) C) and D)

Question 6

While conducting research with a small population in South America you note that an overwhelming majority of individuals exhibit signs of a specific genetic abnormality.This is MOST likely the result of

Accepted Answer

A)   natural selection.
B)   the founder effect.
C)   extinction.
D)   gene flow.E) B) and C)
F) All of the above

Question 7

The best-documented case of industrial melanism involves

Accepted Answer

A)   Galápagos finches.
B)   dung beetles.
C)   monarch butterflies.
D)   peppered moths.E) All of the above
F) None of the above

Question 8

A deme is

Accepted Answer

A)   the nongenetic part of inheritance, including learned behavior.
B)   all the members of a species.
C)   the part of a gene pool that does not reproduce.
D)   a group of organisms that have the potential to reproduce.E) B) and C)
F) All of the above

Question 9

You are reading a scientific article about cheetahs that have stripes instead of spots.The article refers to this as a genetic mutation.Though they have no negative impact on the cheetahs' fitness, why are the stripes nevertheless considered a genetic mutation?

Accepted Answer

A)   Mutations are often adaptively neutral.
B)   Mutations always emerge as evolutionary disadvantages eventually.
C)   Mutations never have an effect on the phenotype.
D)   Mutations only affect genotypes.E) None of the above
F) C) and D)

Question 10

The physical location of a gene within the genome is called the

Accepted Answer

A)   chromosome.
B)   nucleus.
C)   address.
D)   locus.E) A) and B)
F) None of the above

Question 11

Hardy-Weinberg equilibrium assumes

Accepted Answer

A)   strong selection pressure on the trait(s)  being studied.
B)   a significant mutation rate from generation to generation.
C)   gene flow that is equal both into and out of the population.
D)   no gene flow, mutation, or natural selection.E) A) and B)
F) None of the above

Question 12

Evolution can best be defined as

Accepted Answer

A)   the appearance of a new species.
B)   a change in allele frequencies in a breeding population over time.
C)   changes in the DNA of an individual over his or her lifetime.
D)   a process that occurs only over extremely long periods of time.E) A) and B)
F) C) and D)

Question 13

Together, all of the alleles contained within a group of interbreeding individuals are known as a

Accepted Answer

A)   gene pool.
B)   population.
C)   clinal distribution.
D)   polymorphism.E) B) and C)
F) B) and D)

Question 14

How can humans become infected with malaria?

Accepted Answer

A)   having the parasite enter the blood while being fed on by infected mosquitoes
B)   having a genetic mutation that manifests as the disease
C)   drinking bad water
D)   eating spoiled foodE) A) and D)
F) A) and C)

Question 15

The ABO and MN blood-type frequencies of the Dunkers differ significantly from those of current American and German populations due to

Accepted Answer

A)   genetic drift.
B)   natural selection.
C)   gene flow.
D)   mutation.E) B) and D)
F) A) and C)

Question 16

An individual who displays the disease sickle-cell anemia must have inherited the deleterious allele from both phenotypically normal parents.This individual is therefore

Accepted Answer

A)   homozygous, with two dominant alleles.
B)   homozygous, with two recessive alleles.
C)   heterozygous, with one dominant and one recessive allele.
D)   haplozygous.E) A) and D)
F) None of the above

Question 17

Fitness trade-off refers to selection favoring which genotype?

Accepted Answer

A)   homozygous dominant
B)   homozygous recessive
C)   heterozygous
D)   No genotype is favored.E) C) and D)
F) None of the above

Question 18

Explain how the founder effect can lead to a descendent population that differs greatly from its parent population over a relatively short period of time.

Accepted Answer

The founder effect is a special kind of ...

Question 19

In certain species of nonhuman primates there are groups where only one dominant female has access to mates.The other females must wait until the opportunity to mate presents itself.This
Will have direct impacts on "fitness," influencing which of the following?

Accepted Answer

A)   reproductive success
B)   aggressiveness
C)   strength
D)   age at deathE) A) and B)
F) B) and C)

Question 20

The mutation known as trisomy 21, in which an extra copy of chromosome 21 is present, is more commonly known as ________ syndrome.

Accepted Answer

A)   Turner
B)   Down
C)   Klinefelter's
D)   WilliamsE) C) and D)
F) None of the above

Exam 4: Genes and Their Evolution: Population Genetics

Mutations in DNA found in which cells are MOST likely to have significant evolutionary consequences?

Correct Answer
verified

You are reading a scientific article about cheetahs that have stripes instead of spots.The article refers to this as a genetic mutation.Though they have no negative impact on the cheetahs' fitness, why are the stripes nevertheless considered a genetic mutation?

Correct Answer
verified

An individual who displays the disease sickle-cell anemia must have inherited the deleterious allele from both phenotypically normal parents.This individual is therefore

Correct Answer
verified

The ABO and MN blood-type frequencies of the Dunkers differ significantly from those of current American and German populations due to

Correct Answer
verified

Fitness trade-off refers to selection favoring which genotype?

Correct Answer
verified

Evolution can best be defined as

Correct Answer
verified

Australian aborigines are an endogamous society.This means that marriage and reproduction take place within the group, leading to

Correct Answer
verified

The physical location of a gene within the genome is called the

Correct Answer
verified

Correct Answer
verified

Together, all of the alleles contained within a group of interbreeding individuals are known as a

Correct Answer
verified

What effect does natural selection have on population variation?

Correct Answer
verified

In certain species of nonhuman primates there are groups where only one dominant female has access to mates.The other females must wait until the opportunity to mate presents itself.This Will have direct impacts on "fitness," influencing which of the following?

Correct Answer
verified

While conducting research with a small population in South America you note that an overwhelming majority of individuals exhibit signs of a specific genetic abnormality.This is MOST likely the result of

Correct Answer
verified

A deme is

Correct Answer
verified

How can humans become infected with malaria?

Correct Answer
verified

In a classroom taste test for PTC the genotype frequency was determined to be P = 0.35 and Q = 0.65.After applying the Hardy-Weinberg equation, the percentage of genotypes was found to be as follows:

Correct Answer
verified

Explain how the founder effect can lead to a descendent population that differs greatly from its parent population over a relatively short period of time.

Correct Answer
verified
The founder effect is a special kind of ...
View Answer

Hardy-Weinberg equilibrium assumes

Correct Answer
verified

The mutation known as trisomy 21, in which an extra copy of chromosome 21 is present, is more commonly known as ________ syndrome.

Correct Answer
verified

The best-documented case of industrial melanism involves

Correct Answer
verified

Exam 4: Genes and Their Evolution: Population Genetics

Mutations in DNA found in which cells are MOST likely to have significant evolutionary consequences?

Correct AnswerverifiedShow Answer

You are reading a scientific article about cheetahs that have stripes instead of spots.The article refers to this as a genetic mutation.Though they have no negative impact on the cheetahs' fitness, why are the stripes nevertheless considered a genetic mutation?

Correct AnswerverifiedShow Answer

An individual who displays the disease sickle-cell anemia must have inherited the deleterious allele from both phenotypically normal parents.This individual is therefore

Correct AnswerverifiedShow Answer

The ABO and MN blood-type frequencies of the Dunkers differ significantly from those of current American and German populations due to

Correct AnswerverifiedShow Answer

Fitness trade-off refers to selection favoring which genotype?

Correct AnswerverifiedShow Answer

Evolution can best be defined as

Correct AnswerverifiedShow Answer

Australian aborigines are an endogamous society.This means that marriage and reproduction take place within the group, leading to

Correct AnswerverifiedShow Answer

The physical location of a gene within the genome is called the

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Together, all of the alleles contained within a group of interbreeding individuals are known as a

Correct AnswerverifiedShow Answer

What effect does natural selection have on population variation?

Correct AnswerverifiedShow Answer

In certain species of nonhuman primates there are groups where only one dominant female has access to mates.The other females must wait until the opportunity to mate presents itself.This Will have direct impacts on "fitness," influencing which of the following?

Correct AnswerverifiedShow Answer

While conducting research with a small population in South America you note that an overwhelming majority of individuals exhibit signs of a specific genetic abnormality.This is MOST likely the result of

Correct AnswerverifiedShow Answer

A deme is

Correct AnswerverifiedShow Answer

How can humans become infected with malaria?

Correct AnswerverifiedShow Answer

In a classroom taste test for PTC the genotype frequency was determined to be P = 0.35 and Q = 0.65.After applying the Hardy-Weinberg equation, the percentage of genotypes was found to be as follows:

Correct AnswerverifiedShow Answer

Explain how the founder effect can lead to a descendent population that differs greatly from its parent population over a relatively short period of time.

Correct AnswerverifiedThe founder effect is a special kind of ...View AnswerShow Answer

Hardy-Weinberg equilibrium assumes

Correct AnswerverifiedShow Answer

The mutation known as trisomy 21, in which an extra copy of chromosome 21 is present, is more commonly known as ________ syndrome.

Correct AnswerverifiedShow Answer

The best-documented case of industrial melanism involves

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified
The founder effect is a special kind of ...
View Answer

Correct Answer
verified

Correct Answer
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Correct Answer
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