Question 1

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. 
A)  It increases variation. 
B)  It decreases variation. 
C)  It both increases and decreases variation. 
D)  It does not affect variation.

Question 2

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. 
A)  homozygous, with two dominant alleles. 
B)  homozygous, with two recessive alleles. 
C)  heterozygous, with one dominant and one recessive allele. 
D)  haplozygous.

Question 3

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 death 
A)  reproductive success 
B)  aggressiveness 
C)  strength 
D)  age at death

Question 4

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. 
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.

Question 5

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. 
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.

Question 6

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. 
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.

Question 7

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

Accepted Answer

A)  chromosome. 
B)  nucleus. 
C)  address. 
D)  locus. 
A)  chromosome. 
B)  nucleus. 
C)  address. 
D)  locus.

Question 8

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. 
A)  natural selection. 
B)  the founder effect. 
C)  extinction. 
D)  gene flow.

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. 
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.

Question 10

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. 
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.

Question 11

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

Question 12

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)  Williams 
A)  Turner 
B)  Down 
C)  Klinefelter's 
D)  Williams

Question 13

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 14

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

Question 15

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 food 
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 food

Question 16

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

Question 17

The best-documented case of industrial melanism involves

Accepted Answer

A)  Galápagos finches. 
B)  dung beetles. 
C)  monarch butterflies. 
D)  peppered moths. 
A)  Galápagos finches. 
B)  dung beetles. 
C)  monarch butterflies. 
D)  peppered moths.

Question 18

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. 
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.

Question 19

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. 
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.

Question 20

Fitness trade-off refers to selection favoring which genotype?

Accepted Answer

A)  homozygous dominant 
B)  homozygous recessive 
C)  heterozygous 
D)  No genotype is favored. 
A)  homozygous dominant 
B)  homozygous recessive 
C)  heterozygous 
D)  No genotype is favored.

What effect does natural selection have on population variation?

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

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?

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

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:

Hardy-Weinberg equilibrium assumes

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

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

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?

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

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

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.

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

How can humans become infected with malaria?

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

The best-documented case of industrial melanism involves

A deme is

Evolution can best be defined as

Fitness trade-off refers to selection favoring which genotype?

What Is Biological Anthropology

Evolution: Constructing a Fundamental Scientific Theory

Genetics: Reproducing Life and Producing Variation

Biology in the Present: Living People

Biology in the Present: the Other Living Primates

Primate Sociality, Social Behavior, and Culture

Fossils and Their Place in Time and Nature

Primate Origins and Evolution: the First 50 Million Years

Early Hominin Origins and Evolution: The Roots of Humanity

The Origins and Evolution of Early Homo

The Origins, Evolution, and Dispersal of Modern People

The Past 10,000 Years: Agriculture, Population, Biology

Filters

Exam 4: Genes and Their Evolution: Population Genetics

What effect does natural selection have on population variation?

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

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?

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

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:

Hardy-Weinberg equilibrium assumes

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

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

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?

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

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

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.

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

How can humans become infected with malaria?

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

The best-documented case of industrial melanism involves

A deme is

Evolution can best be defined as

Fitness trade-off refers to selection favoring which genotype?

What Is Biological Anthropology

Evolution: Constructing a Fundamental Scientific Theory

Genetics: Reproducing Life and Producing Variation

Biology in the Present: Living People

Biology in the Present: the Other Living Primates

Primate Sociality, Social Behavior, and Culture

Fossils and Their Place in Time and Nature

Primate Origins and Evolution: the First 50 Million Years

Early Hominin Origins and Evolution: The Roots of Humanity

The Origins and Evolution of Early Homo

The Origins, Evolution, and Dispersal of Modern People

The Past 10,000 Years: Agriculture, Population, Biology

Filters