Question 1

The assumptions of the Hardy-Weinberg equilibrium principle include all of the following except ________.

Accepted Answer

A)  random mating 
B)  no migration 
C)  limited population size 
D)  All of these are assumptions of Hardy-Weinberg. 
A)  random mating 
B)  no migration 
C)  limited population size 
D)  All of these are assumptions of Hardy-Weinberg. C

Question 2

The fact that blind luck (more technically known as sampling error)can account for changes in allelic frequencies in populations is the evolutionary mechanism called ________.[two words]

Accepted Answer

genetic drift

Question 3

Suppose a founding population carries an allelic frequency not typical of the original population.Which of the following effects would most likely lead to homogenization?

Accepted Answer

A)  genetic drift within the founding population 
B)  random mating within the founding population 
C)  no mutations within either population 
D)  migration between the original and founding populations 
E)  None of the above. 
A)  genetic drift within the founding population 
B)  random mating within the founding population 
C)  no mutations within either population 
D)  migration between the original and founding populations 
E)  None of the above. D

Question 4

At present,the neutral theory of molecular evolution ________.

Accepted Answer

A)  is strongly supported by significant amounts of empirical evidence 
B)  has been disproven, as neutral mutations have not been shown to have been fixed in populations 
C)  is inclusive, as enough data has not yet been evaluated 
D)  seems to work in some species but not others 
A)  is strongly supported by significant amounts of empirical evidence 
B)  has been disproven, as neutral mutations have not been shown to have been fixed in populations 
C)  is inclusive, as enough data has not yet been evaluated 
D)  seems to work in some species but not others

Question 5

The results of an experiment on genetic drift on Drosophila melanogaster are illustrated in the accompanying figure.These data show ________.

Accepted Answer

A)  the loss of heterozygosity in the population over time 
B)  the fixation of alleles in the population over time 
C)  the permanent loss of alleles from the population over time 
D)  All of the above are accurate. 
E)  None of the above is accurate. 
A)  the loss of heterozygosity in the population over time 
B)  the fixation of alleles in the population over time 
C)  the permanent loss of alleles from the population over time 
D)  All of the above are accurate. 
E)  None of the above is accurate.

Question 6

When we track alleles from lineages backwards in time,we see them ultimately fuse into one lineage.The result is a gene tree,which is produced by a process called ________.

Accepted Answer

The answer of When we track alleles from lineages backwards...

Question 7

A phenomenon known as ________ [one or two words] occurs under conditions where a strong selection pressure acts on a particular change in an amino acid,which results in the corresponding increase in frequency of a closely linked neutral (or even mildly deleterious)mutation.

Accepted Answer

hitchhikin

Question 8

Gene flow through migration ________.

Accepted Answer

A)  has no effect on allele frequencies of populations 
B)  can go only in one direction 
C)  may have the largest impact on small populations, such as those on islands 
D)  maintains the Hardy-Weinberg equilibrium 
A)  has no effect on allele frequencies of populations 
B)  can go only in one direction 
C)  may have the largest impact on small populations, such as those on islands 
D)  maintains the Hardy-Weinberg equilibrium

Question 9

The accompanying figure details the possible outcomes in a scenario in which 10 zygotes are formed from a gene pool where the frequency of the allele A1 is 0.6,and A2 is 0.4.This graph is shown here.According to this graph,the probability that the frequency of A1 will increase to 0.7 in the next generation is about ________.

Accepted Answer

A)  8%. 
B)  12% 
C)  16% 
D)  40% 
E)  70% 
A)  8%. 
B)  12% 
C)  16% 
D)  40% 
E)  70%

Question 10

Data in the accompanying figure shows the results of allelic frequency analysis of an insect-pollinated plant whose seeds are transported by wind and water,therefore making this plant one of the first colonizers of new islands.The data―particularly the lower variation of allele frequencies of intermediate-aged populations―supports the hypothesis that ________.

Accepted Answer

A)  genetic drift tends to homogenize populations 
B)  migration tends to homogenize populations 
C)  gene flow tends to homogenize populations 
D)  A, B, and C are all accurate. 
E)  B and C are both accurate. 
A)  genetic drift tends to homogenize populations 
B)  migration tends to homogenize populations 
C)  gene flow tends to homogenize populations 
D)  A, B, and C are all accurate. 
E)  B and C are both accurate.

Question 11

A locus at which different individuals in a population carry different alleles is known as a(n)________.

Accepted Answer

The answer of A locus at which different individuals in...

Question 12

A scenario in which 250 zygotes are formed from a gene pool in which the frequency of the allele A₁ is 0.6,and A₂ is 0.4,generates the accompanying figure.Explain,in general terms,what each of these graphs reveals.Is there a consistent pattern between all three graphs? If so,describe and provide an explanation for it.Are there inconsistencies among graphs? Describe and provide an explanation for these also.

Accepted Answer

The answer of A scenario in which 250 zygotes are...

Question 13

The effects of inbreeding depression has been documented in ________.

Accepted Answer

A)  plants only 
B)  animals only 
C)  both plants and animals 
D)  This is a hypothetical construct and has yet to be documented. 
A)  plants only 
B)  animals only 
C)  both plants and animals 
D)  This is a hypothetical construct and has yet to be documented.

Question 14

In an evolutionary sense,________ is the transfer of alleles from one population to another.

Accepted Answer

The answer of In an evolutionary sense,________ is the transfer...

Question 15

With enough time and in the absence of other evolutionary mechanisms,genetic drift will ________.

Accepted Answer

A)  reduce the genetic variation in a population 
B)  increase the genetic variation in a population 
C)  have no effect on the genetic variation of a population 
D)  None of the above. 
A)  reduce the genetic variation in a population 
B)  increase the genetic variation in a population 
C)  have no effect on the genetic variation of a population 
D)  None of the above.

Question 16

The random discrepancy between theoretical predictions and actual outcomes is called ________.[two words]

Accepted Answer

The answer of The random discrepancy between theoretical predictions and...

Question 17

The survival and fertility rates of the offspring of related individuals are commonly reduced.This is known as ________.[two words]

Accepted Answer

inbreeding

Question 18

Unusually high rates of rare heritable traits,such as achromatopsia in the Pingelapese people,is often due to ________.

Accepted Answer

A)  genetic drift 
B)  natural selection 
C)  hitchhiking 
D)  the founder effect 
E)  None of the above. 
A)  genetic drift 
B)  natural selection 
C)  hitchhiking 
D)  the founder effect 
E)  None of the above.

Question 19

The neutral theory of molecular evolution,as developed by Kimura,posits that ________.

Accepted Answer

A)  functionally neutral mutations that become fixed in populations occur in much larger numbers than those that become fixed by natural selection 
B)  functionally neutral mutations never become fixed in populations without some element of selection also acting on them 
C)  functionally neutral mutations are not subject to genetic drift 
D)  functionally neutral mutations contribute very little to changes at the molecular level 
A)  functionally neutral mutations that become fixed in populations occur in much larger numbers than those that become fixed by natural selection 
B)  functionally neutral mutations never become fixed in populations without some element of selection also acting on them 
C)  functionally neutral mutations are not subject to genetic drift 
D)  functionally neutral mutations contribute very little to changes at the molecular level

Question 20

If genetic drift is not accompanied by natural selection,mutation,or migration,then the frequencies of alleles will "wander" between 0 and 1.Using the accompanying figure,which of the following is an accurate statement?

Accepted Answer

A)  Random sampling error generates fluctuations in allelic frequencies over generations, so all populations-both simulated and real-have been found to follow the same evolutionary trajectory. 
B)  The effects of genetic drift are more immediate, and more pronounced, on small population sizes. 
C)  Genetic drift will have no long-term effect on allelic frequencies if the population numbers more than 40 individuals. 
D)  None of these is an accurate statement. 
A)  Random sampling error generates fluctuations in allelic frequencies over generations, so all populations-both simulated and real-have been found to follow the same evolutionary trajectory. 
B)  The effects of genetic drift are more immediate, and more pronounced, on small population sizes. 
C)  Genetic drift will have no long-term effect on allelic frequencies if the population numbers more than 40 individuals. 
D)  None of these is an accurate statement.

The assumptions of the Hardy-Weinberg equilibrium principle include all of the following except ________.

The fact that blind luck (more technically known as sampling error)can account for changes in allelic frequencies in populations is the evolutionary mechanism called ________.[two words]

Suppose a founding population carries an allelic frequency not typical of the original population.Which of the following effects would most likely lead to homogenization?

At present,the neutral theory of molecular evolution ________.

The results of an experiment on genetic drift on Drosophila melanogaster are illustrated in the accompanying figure.These data show ________.

When we track alleles from lineages backwards in time,we see them ultimately fuse into one lineage.The result is a gene tree,which is produced by a process called ________.

A phenomenon known as ________ [one or two words] occurs under conditions where a strong selection pressure acts on a particular change in an amino acid,which results in the corresponding increase in frequency of a closely linked neutral (or even mildly deleterious)mutation.

Gene flow through migration ________.

A locus at which different individuals in a population carry different alleles is known as a(n)________.

The effects of inbreeding depression has been documented in ________.

In an evolutionary sense,________ is the transfer of alleles from one population to another.

With enough time and in the absence of other evolutionary mechanisms,genetic drift will ________.

The random discrepancy between theoretical predictions and actual outcomes is called ________.[two words]

The survival and fertility rates of the offspring of related individuals are commonly reduced.This is known as ________.[two words]

Unusually high rates of rare heritable traits,such as achromatopsia in the Pingelapese people,is often due to ________.

The neutral theory of molecular evolution,as developed by Kimura,posits that ________.

If genetic drift is not accompanied by natural selection,mutation,or migration,then the frequencies of alleles will "wander" between 0 and 1.Using the accompanying figure,which of the following is an accurate statement?

A Case for Evolutionary Thinking: Understanding HIV

The Pattern of Evolution

Evolution by Natural Selection

Estimating Evolutionary Trees

Variation Among Individuals

Mendelian Genetics in Populations I: Selection and Mutation

Evolution at Multiple Loci: Linkage and Sex

Evolution at Multiple Loci: Quantitative Genetics

Studying Adaptation: Evolutionary Analysis of Form and Function

Sexual Selection

The Evolution of Social Behavior

Aging and Other Life-History Characters

Evolution and Human Health

Phylogenomics and the Molecular Basis of Adaptation

Mechanisms of Speciation

The Origins of Life and Precambrian Evolution

Evolution and the Fossil Record

Development and Evolution

Human Evolution

Filters

Exam 7: Mendelian Genetics in Populations II: Migration, Drift, & Nonrandom Mating

The assumptions of the Hardy-Weinberg equilibrium principle include all of the following except ________.

The fact that blind luck (more technically known as sampling error)can account for changes in allelic frequencies in populations is the evolutionary mechanism called ________.[two words]

Suppose a founding population carries an allelic frequency not typical of the original population.Which of the following effects would most likely lead to homogenization?

At present,the neutral theory of molecular evolution ________.

The results of an experiment on genetic drift on Drosophila melanogaster are illustrated in the accompanying figure.These data show ________.

When we track alleles from lineages backwards in time,we see them ultimately fuse into one lineage.The result is a gene tree,which is produced by a process called ________.

A phenomenon known as ________ [one or two words] occurs under conditions where a strong selection pressure acts on a particular change in an amino acid,which results in the corresponding increase in frequency of a closely linked neutral (or even mildly deleterious)mutation.

Gene flow through migration ________.

A locus at which different individuals in a population carry different alleles is known as a(n)________.

The effects of inbreeding depression has been documented in ________.

In an evolutionary sense,________ is the transfer of alleles from one population to another.

With enough time and in the absence of other evolutionary mechanisms,genetic drift will ________.

The random discrepancy between theoretical predictions and actual outcomes is called ________.[two words]

The survival and fertility rates of the offspring of related individuals are commonly reduced.This is known as ________.[two words]

Unusually high rates of rare heritable traits,such as achromatopsia in the Pingelapese people,is often due to ________.

The neutral theory of molecular evolution,as developed by Kimura,posits that ________.

If genetic drift is not accompanied by natural selection,mutation,or migration,then the frequencies of alleles will "wander" between 0 and 1.Using the accompanying figure,which of the following is an accurate statement?

A Case for Evolutionary Thinking: Understanding HIV

The Pattern of Evolution

Evolution by Natural Selection

Estimating Evolutionary Trees

Variation Among Individuals

Mendelian Genetics in Populations I: Selection and Mutation

Evolution at Multiple Loci: Linkage and Sex

Evolution at Multiple Loci: Quantitative Genetics

Studying Adaptation: Evolutionary Analysis of Form and Function

Sexual Selection

The Evolution of Social Behavior

Aging and Other Life-History Characters

Evolution and Human Health

Phylogenomics and the Molecular Basis of Adaptation

Mechanisms of Speciation

The Origins of Life and Precambrian Evolution

Evolution and the Fossil Record

Development and Evolution

Human Evolution

Filters