Question 1

Moths that can evade a bat's echolocation have _____ that increase their likelihood of survival and reproduction.

Accepted Answer

A)  fitness
B)  selection
C)  mutations
D)  adaptationsE) All of the above
F) A) and B)

Question 2

______ could not be involved in gene flow.

Accepted Answer

A)  Hybridization between neighboring populations
B)  Gametes dispersed by ocean currents
C)  Disassortative mating within a population
D)  Wind-blown pollenE) B) and D)
F) A) and C)

Question 3

For a gene with two alternative alleles, A (with a frequency of p)  and B (with a frequency of q) , the term in the algebraic form of the Hardy-Weinberg equilibrium for the heterozygote genotype frequency is

Accepted Answer

A)  p2.
B)  q2.
C)  2pq.
D)  (p+q) 2.E) B) and C)
F) A) and C)

Question 4

Antigens on red blood cells are hereditary traits that allow blood to be typed in different ways.One system is based on a gene with two alleles, M and N.If the frequency of the M allele in a population is 0.4, then according to the Hardy-Weinberg rule, the expected frequency of the heterozygous MN genotype is ___.

Accepted Answer

A)  0.16
B)  0.24
C)  0.36
D)  0.48E) C) and D)
F) B) and D)

Question 5

Gene flow, defined as the movement of genes from one population to another, can take place by migration, as well as

Accepted Answer

A)  physical movement of genes within an individual by transposons.
B)  removing the barriers between the populations.
C)  mating between individuals of adjacent populations.
D)  mating with certain trait-containing individuals.E) None of the above
F) A) and C)

Question 6

Female cardinals select male mates in part based on their bright red color.What effect would this have on a cardinal population that was in Hardy-Weinberg equilibrium?

Accepted Answer

A)  The red allele frequencies would decrease because of equilibrium.
B)  The frequency of red alleles would be less than those predicted by Hardy-Weinberg equilibrium.
C)  The frequency of red alleles would be greater than those predicted by Hardy-Weinberg equilibrium.
D)  The frequency of red alleles would be equal to those predicted by Hardy-Weinberg equilibrium.E) B) and C)
F) A) and D)

Question 7

In the experiment above, guppy color patterns (spots)  were measured in populations exposed to increasing amounts of predation.From this you could conclude that ____ .

Accepted Answer

A)  evolutionary changes take millions of years to appear
B)  predators are less likely to catch and eat brightly colored guppies
C)  predators are more likely to catch and eat brightly colored guppies
D)  brightly colored guppies are more likely to reproduce in the presence of predatorsE) A) and C)
F) All of the above

Question 8

In the Hardy-Weinberg equation, p and q are _____.

Accepted Answer

A)  genotypes
B)  mutation rates
C)  phenotypes
D)  allele frequenciesE) A) and B)
F) A) and C)

Question 9

In a small population of cockroaches living in your kitchen, only a few roaches mate in one year.This can lead to random changes in allele frequency in the population through ______

Accepted Answer

A)  nonrandom mating.
B)  selection.
C)  genetic drift.
D)  mutation.E) All of the above
F) C) and D)

Question 10

Two parents who do not have sickle cell anemia have a child that has the disease.The parents are both:

Accepted Answer

A)  homozygous for the sickle cell allele.
B)  heterozygous for the sickle cell allele.
C)  homozygous for the normal allele.
D)  epistatic for the sickle cell allele.E) B) and C)
F) None of the above

Question 11

Animals that select mates that are phenotypically similar will have _____ when compared with Hardy-Weinberg predictions.

Accepted Answer

A)  fewer homozygotes
B)  more homozygotes.
C)  less natural selection
D)  more mutationsE) C) and D)
F) A) and D)

Question 12

Reproductive success of an individual is known as:

Accepted Answer

A)  variation.
B)  adaptive makeup.
C)  fitness.
D)  microevolution.E) None of the above
F) C) and D)

Question 13

In order for natural selection to occur within a population, certain conditions must be met.One such condition is

Accepted Answer

A)  heterozygosity must be very low.
B)  frequent mutations that are inherited.
C)  phenotypic differences resulting from environmental conditions.
D)  phenotypic variations that are genetic.E) A) and B)
F) All of the above

Question 14

In a forest, trees that get more sunlight grow taller than other nearby trees.This is a form of ______

Accepted Answer

A)  natural selection.
B)  directional selection.
C)  artificial selection.
D)  disruptive selection.E) B) and D)
F) A) and C)

Question 15

An island is on the migration route of sea birds.This island also has abundant tree nesting birds that live on the island permanently and are not found on any other island.The tree nesting birds are more likely than the sea birds to be in Hardy-Weinberg equilibrium because:

Accepted Answer

A)  the sea bird population is larger.
B)  there are fewer mutations in the sea birds.
C)  mating is random in the tree nesting birds.
D)  of high immigration in the sea bird population.E) A) and D)
F) B) and C)

Question 16

People homozygous for the sickle-cell anemia allele develop a life threatening disease, while those homozygous for the normal allele are at the highest risk of dying from malaria.Carriers have some resistance to malaria, but do not develop sickle cell anemia.This is an example of ____

Accepted Answer

A)  founder effect.
B)  genetic bottleneck.
C)  heterozygosity.
D)  heterozygote advantage.E) None of the above
F) All of the above

Question 17

In the graph above, how can the change in infant mortality be explained as birth weight increases from 2 to 7 pounds?

Accepted Answer

A)  A larger baby will have more developed organs and thus have greater fitness.
B)  A baby closer to 7 pounds will have more developed organs and thus have lower mortality.
C)  A baby closer to 2 pounds will not be able to be delivered safely and thus have lower mortality.
D)  A baby closer to 7 pounds will have more developed organs and thus have higher motality.E) None of the above
F) B) and C)

Question 18

Hardy-Weinberg pointed out that the original proportions of the genotypes in a population would remain constant from generation to generation if certain assumptions are met.Which one of the following is not a Hardy-Weinberg condition?

Accepted Answer

A)  No gene flow occurs.
B)  Random mating occurs.
C)  No polymorphic loci exist in the population.
D)  No selection occurs.E) A) and C)
F) C) and D)

Question 19

The disease, sickle-cell anemia is common in malaria-infested areas because individuals that are heterozygous for the gene (AS)  have enhanced resistance to malaria over normal individuals (AA) .Individuals with severe sickle-cell anemia (SS)  usually die before reproduction.If this population moves to an area without malaria, what will happen to the allele frequency of the A allele over time?

Accepted Answer

A)  It will go up because there is no sickle cell anemia.
B)  It will go down because there is no malaria.
C)  It will go down because there is no sickle cell anemia.
D)  It will go up because there is no malaria.E) None of the above
F) A) and D)

Question 20

In the graph above, which baby characteristics would explain the percent infant mortality curve and any subsequent effects on fitness?

Accepted Answer

A)  The smaller the baby the better the chance of survival.
B)  The baby needs to be small enough to survive after birth, but large enough for a safe delivery.
C)  The baby needs to be large enough to survive after birth, but small enough for a safe delivery.
D)  There is no correlation between birth weight and survival.E) A) and B)
F) A) and C)

Exam 20: Genes Within Populations

Moths that can evade a bat's echolocation have _____ that increase their likelihood of survival and reproduction.

Correct Answer
verified

Reproductive success of an individual is known as:

Correct Answer
verified

Gene flow, defined as the movement of genes from one population to another, can take place by migration, as well as

Correct Answer
verified

In a small population of cockroaches living in your kitchen, only a few roaches mate in one year.This can lead to random changes in allele frequency in the population through ______

Correct Answer
verified

In the graph above, which baby characteristics would explain the percent infant mortality curve and any subsequent effects on fitness?

Correct Answer
verified

In a forest, trees that get more sunlight grow taller than other nearby trees.This is a form of ______

Correct Answer
verified

Correct Answer
verified

In order for natural selection to occur within a population, certain conditions must be met.One such condition is

Correct Answer
verified

Two parents who do not have sickle cell anemia have a child that has the disease.The parents are both:

Correct Answer
verified

Correct Answer
verified

For a gene with two alternative alleles, A (with a frequency of p) and B (with a frequency of q) , the term in the algebraic form of the Hardy-Weinberg equilibrium for the heterozygote genotype frequency is

Correct Answer
verified

In the Hardy-Weinberg equation, p and q are _____.

Correct Answer
verified

Animals that select mates that are phenotypically similar will have _____ when compared with Hardy-Weinberg predictions.

Correct Answer
verified

People homozygous for the sickle-cell anemia allele develop a life threatening disease, while those homozygous for the normal allele are at the highest risk of dying from malaria.Carriers have some resistance to malaria, but do not develop sickle cell anemia.This is an example of ____

Correct Answer
verified

In the graph above, how can the change in infant mortality be explained as birth weight increases from 2 to 7 pounds?

Correct Answer
verified

Female cardinals select male mates in part based on their bright red color.What effect would this have on a cardinal population that was in Hardy-Weinberg equilibrium?

Correct Answer
verified

In the experiment above, guppy color patterns (spots) were measured in populations exposed to increasing amounts of predation.From this you could conclude that ____ .

Correct Answer
verified

An island is on the migration route of sea birds.This island also has abundant tree nesting birds that live on the island permanently and are not found on any other island.The tree nesting birds are more likely than the sea birds to be in Hardy-Weinberg equilibrium because:

Correct Answer
verified

______ could not be involved in gene flow.

Correct Answer
verified

Hardy-Weinberg pointed out that the original proportions of the genotypes in a population would remain constant from generation to generation if certain assumptions are met.Which one of the following is not a Hardy-Weinberg condition?

Correct Answer
verified

Exam 20: Genes Within Populations

Moths that can evade a bat's echolocation have _____ that increase their likelihood of survival and reproduction.

Correct AnswerverifiedShow Answer

Reproductive success of an individual is known as:

Correct AnswerverifiedShow Answer

Gene flow, defined as the movement of genes from one population to another, can take place by migration, as well as

Correct AnswerverifiedShow Answer

In a small population of cockroaches living in your kitchen, only a few roaches mate in one year.This can lead to random changes in allele frequency in the population through ______

Correct AnswerverifiedShow Answer

In the graph above, which baby characteristics would explain the percent infant mortality curve and any subsequent effects on fitness?

Correct AnswerverifiedShow Answer

In a forest, trees that get more sunlight grow taller than other nearby trees.This is a form of ______

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

In order for natural selection to occur within a population, certain conditions must be met.One such condition is

Correct AnswerverifiedShow Answer

Two parents who do not have sickle cell anemia have a child that has the disease.The parents are both:

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

For a gene with two alternative alleles, A (with a frequency of p) and B (with a frequency of q) , the term in the algebraic form of the Hardy-Weinberg equilibrium for the heterozygote genotype frequency is

Correct AnswerverifiedShow Answer

In the Hardy-Weinberg equation, p and q are _____.

Correct AnswerverifiedShow Answer

Animals that select mates that are phenotypically similar will have _____ when compared with Hardy-Weinberg predictions.

Correct AnswerverifiedShow Answer

People homozygous for the sickle-cell anemia allele develop a life threatening disease, while those homozygous for the normal allele are at the highest risk of dying from malaria.Carriers have some resistance to malaria, but do not develop sickle cell anemia.This is an example of ____

Correct AnswerverifiedShow Answer

In the graph above, how can the change in infant mortality be explained as birth weight increases from 2 to 7 pounds?

Correct AnswerverifiedShow Answer

Female cardinals select male mates in part based on their bright red color.What effect would this have on a cardinal population that was in Hardy-Weinberg equilibrium?

Correct AnswerverifiedShow Answer

In the experiment above, guppy color patterns (spots) were measured in populations exposed to increasing amounts of predation.From this you could conclude that ____ .

Correct AnswerverifiedShow Answer

An island is on the migration route of sea birds.This island also has abundant tree nesting birds that live on the island permanently and are not found on any other island.The tree nesting birds are more likely than the sea birds to be in Hardy-Weinberg equilibrium because:

Correct AnswerverifiedShow Answer

______ could not be involved in gene flow.

Correct AnswerverifiedShow Answer

Hardy-Weinberg pointed out that the original proportions of the genotypes in a population would remain constant from generation to generation if certain assumptions are met.Which one of the following is not a Hardy-Weinberg condition?

Correct AnswerverifiedShow Answer

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