Question 1

The absence of the A and B alleles in Native American populations is a result of

Accepted Answer

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

Question 2

Spontaneous mutations are defined as

Accepted Answer

A) errors caused by some external agent such as X-rays or exposure to toxic chemicals. 
B) errors caused by random changes in DNA. 
C) errors occurring during mitosis. 
D) b and c only. 
A) errors caused by some external agent such as X-rays or exposure to toxic chemicals. 
B) errors caused by random changes in DNA. 
C) errors occurring during mitosis. 
D) b and c only.

Question 3

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

Accepted Answer

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

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, aa: 0.16.In the second generation, genotype frequencies shifted to AA: 0.16, Aa: 0.48, 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) both b and c 
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) both b and c

Question 5

Why is the incidence of sickle-cell anemia an excellent example of a "balanced polymorphism," in which two or more alleles are maintained by natural selection in a population?

Accepted Answer

Homozygous normal individuals, while hav

Question 6

A study of Darwin's finches after a long period of drought found that all species of finch on one of the islands developed wide beaks in order to break open seeds.The type of evolution that leads to this phenotype distribution is

Accepted Answer

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

Question 7

Which of the following is not a genetic disorder that decreases susceptibility to malaria?

Accepted Answer

A) G6pd deficiency (favism) 
B) sickle-cell anemia 
C) Huntington's chorea 
D) thalassemia 
A) G6pd deficiency (favism) 
B) sickle-cell anemia 
C) Huntington's chorea 
D) thalassemia

Question 8

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 9

You and your friend are reading a scientific article about cheetahs that have stripes instead of spots.The article refers to this as a genetic mutation.Your friend wonders why the striped cheetahs are not referred to as a new species.You respond:

Accepted Answer

A) The article is mistaken.Striped cheetahs are clearly a new species. 
B) Genetic mutations only cause superficial changes that do not result in evolutionary advantages. 
C) When the frequency of striped individuals in the population reaches 50%, they will be categorized as a new species. 
D) The stripes are caused by an individual mutation, and have not evolved in a reproductively isolated population. 
A) The article is mistaken.Striped cheetahs are clearly a new species. 
B) Genetic mutations only cause superficial changes that do not result in evolutionary advantages. 
C) When the frequency of striped individuals in the population reaches 50%, they will be categorized as a new species. 
D) The stripes are caused by an individual mutation, and have not evolved in a reproductively isolated population.

Question 10

Population geneticists refer to a reproductive population as a(n)

Accepted Answer

A) allelic pool. 
B) deme. 
C) micropopulation. 
D) macropopulation. 
A) allelic pool. 
B) deme. 
C) micropopulation. 
D) macropopulation.

Question 11

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 gain mate access 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 12

Which African people's southern migration may have led to a significant increase in the incidence of malaria?

Accepted Answer

A) Masai 
B) Turkana 
C) Efe 
D) Bantu 
A) Masai 
B) Turkana 
C) Efe 
D) Bantu

Question 13

The clinal decrease in type B blood from East Asia to Western Europe is probably the result of

Accepted Answer

A) founder effect. 
B) stabilizing selection. 
C) mutation. 
D) gene flow. 
A) founder effect. 
B) stabilizing selection. 
C) mutation. 
D) gene flow.

Question 14

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 15

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

Accepted Answer

A) negative assortative mating has maintained gene frequencies. 
B) mutations have likely occurred resulting in the same frequency. 
C) mating in this population is random. 
D) the population is small and we cannot detect change. 
A) negative assortative mating has maintained gene frequencies. 
B) mutations have likely occurred resulting in the same frequency. 
C) mating in this population is random. 
D) the population is small and we cannot detect change.

Question 16

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

Question 17

Mutations to which of the following 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 18

When individuals of the same species are reproductively isolated, genetic differences may accumulate in sufficient number so that new species could emerge.Such an event would be an example of

Accepted Answer

A) microevolution. 
B) founder effect. 
C) equilibrium. 
D) macroevolution. 
A) microevolution. 
B) founder effect. 
C) equilibrium. 
D) macroevolution.

Question 19

What effect does natural selection have on population variation?

Accepted Answer

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

Question 20

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.

The absence of the A and B alleles in Native American populations is a result of

Spontaneous mutations are defined as

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

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

Why is the incidence of sickle-cell anemia an excellent example of a "balanced polymorphism," in which two or more alleles are maintained by natural selection in a population?

A study of Darwin's finches after a long period of drought found that all species of finch on one of the islands developed wide beaks in order to break open seeds.The type of evolution that leads to this phenotype distribution is

Which of the following is not a genetic disorder that decreases susceptibility to malaria?

Evolution can best be defined as

You and your friend are reading a scientific article about cheetahs that have stripes instead of spots.The article refers to this as a genetic mutation.Your friend wonders why the striped cheetahs are not referred to as a new species.You respond:

Population geneticists refer to a reproductive population as a(n)

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 gain mate access presents itself.This will have direct impacts on "fitness," influencing which of the following?

Which African people's southern migration may have led to a significant increase in the incidence of malaria?

The clinal decrease in type B blood from East Asia to Western Europe is probably the result of

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

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

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

Mutations to which of the following cells are most likely to have significant evolutionary consequences?

When individuals of the same species are reproductively isolated, genetic differences may accumulate in sufficient number so that new species could emerge.Such an event would be an example of

What effect does natural selection have on population variation?

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

What Is Physical 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 Hominid Origins and Evolution: the Roots of Humanity

The Origins and Evolution of Early Homo

The Origins, Evolution, and Dispersal of Modern People

Our Last 10,000 Years: Agriculture, Population, and Biology

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Exam 4: Genes and Their Evolution: Population Genetics

The absence of the A and B alleles in Native American populations is a result of

Spontaneous mutations are defined as

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

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

Why is the incidence of sickle-cell anemia an excellent example of a "balanced polymorphism," in which two or more alleles are maintained by natural selection in a population?

A study of Darwin's finches after a long period of drought found that all species of finch on one of the islands developed wide beaks in order to break open seeds.The type of evolution that leads to this phenotype distribution is

Which of the following is not a genetic disorder that decreases susceptibility to malaria?

Evolution can best be defined as

You and your friend are reading a scientific article about cheetahs that have stripes instead of spots.The article refers to this as a genetic mutation.Your friend wonders why the striped cheetahs are not referred to as a new species.You respond:

Population geneticists refer to a reproductive population as a(n)

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 gain mate access presents itself.This will have direct impacts on "fitness," influencing which of the following?

Which African people's southern migration may have led to a significant increase in the incidence of malaria?

The clinal decrease in type B blood from East Asia to Western Europe is probably the result of

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

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

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

Mutations to which of the following cells are most likely to have significant evolutionary consequences?

When individuals of the same species are reproductively isolated, genetic differences may accumulate in sufficient number so that new species could emerge.Such an event would be an example of

What effect does natural selection have on population variation?

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

What Is Physical 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 Hominid Origins and Evolution: the Roots of Humanity

The Origins and Evolution of Early Homo

The Origins, Evolution, and Dispersal of Modern People

Our Last 10,000 Years: Agriculture, Population, and Biology

Filters