Question 1

Which practice is most likely to result in a change in the Hardy-Weinberg equilibrium of a population or geographic area?

Accepted Answer

A) Random mating from within the established population 
B) Geographic isolation of the established population 
C) Assimilation of immigrants into the existing population 
D) Preponderance of autosomal-dominant traits in the existing population 
A) Random mating from within the established population 
B) Geographic isolation of the established population 
C) Assimilation of immigrants into the existing population 
D) Preponderance of autosomal-dominant traits in the existing population C

Question 2

What is the main purpose of population genetics?

Accepted Answer

A) Determining the factors that allow allelic frequencies to change over time 
B) Determining the geographic origins of specific genetic-based disorders 
C) Assessing the effects of assortive mating on natural selection and evolution 
D) Assessing the differences between race and ethnicity for susceptibility and resistance to infectious diseases 
A) Determining the factors that allow allelic frequencies to change over time 
B) Determining the geographic origins of specific genetic-based disorders 
C) Assessing the effects of assortive mating on natural selection and evolution 
D) Assessing the differences between race and ethnicity for susceptibility and resistance to infectious diseases A

Question 3

What criteria must a population meet in order to stay in Hardy-Weinberg equilibrium?

Accepted Answer

A) Random mating, no migration, and no mutation 
B) Founding commonalities and no haplotype differences 
C) Assortative mating, migration, and frequent mutation 
D) Limited procreation, no diet change 
A) Random mating, no migration, and no mutation 
B) Founding commonalities and no haplotype differences 
C) Assortative mating, migration, and frequent mutation 
D) Limited procreation, no diet change A

Question 4

What pieces of genetic information tend to be passed down from generation to generation with the least variation?

Accepted Answer

A) Mitochondrial DNA 
B) Nuclear DNA 
C) Ribosomal DNA 
D) Histone proteins 
A) Mitochondrial DNA 
B) Nuclear DNA 
C) Ribosomal DNA 
D) Histone proteins

Question 5

Which term refers to a random change in allele frequencies, not based on natural selection?

Accepted Answer

A) Population bottleneck 
B) Genetic drift 
C) Founder effect 
D) Migration effect 
A) Population bottleneck 
B) Genetic drift 
C) Founder effect 
D) Migration effect

Question 6

Agroup of eight space travelers, four men and four women, settled on the planet Zebulon. Their descendants had a very high rate of the autosomal-dominant disorder moonophilia distractens. What factor could explain this phenomenon?

Accepted Answer

A) Equal exposure to an environmental mutagen 
B) Hardy-Weinberg equilibrium 
C) Variable expressivity 
D) Founder effect 
A) Equal exposure to an environmental mutagen 
B) Hardy-Weinberg equilibrium 
C) Variable expressivity 
D) Founder effect

Question 7

Asmall group of people left their homeland and set sail for a tropical island. They settled there, and their descendants lived for many generations. Unfortunately,a relatively high proportion of this new population is afflicted with an autosomal-recessive disease. What would explain this?

Accepted Answer

A) They encouraged immigration of people from the mainland. 
B) An unidentified environmental radiation source was present on the island. 
C) One of the original group members had the gene mutation from conception. 
D) Their lack of genetic diversity made them more vulnerable to new mutations. 
A) They encouraged immigration of people from the mainland. 
B) An unidentified environmental radiation source was present on the island. 
C) One of the original group members had the gene mutation from conception. 
D) Their lack of genetic diversity made them more vulnerable to new mutations.

Question 8

The Black Death was a pandemic spreading across Europe between 1348 and 1350. Estimates state that 30% to 60% of Europe's population died from the Black Death.If welook at Europe's population before the pandemic and compare it to the population several generations later, what are we likely to find?

Accepted Answer

A) More genetic diversity in later generations 
B) Less genetic diversity in later generations 
C) Less genetic diversity in earlier generations 
D) The same degree of genetic diversity in later as in earlier generations 
A) More genetic diversity in later generations 
B) Less genetic diversity in later generations 
C) Less genetic diversity in earlier generations 
D) The same degree of genetic diversity in later as in earlier generations

Question 9

Which statement regarding genetic diversity is most accurate?

Accepted Answer

A) Larger genes are more likely to display diversity than small genes. 
B) Genetic diversity is significant only when a population is isolated. 
C) Genetic disorders are more common in populations that have greater genetic diversity. 
D) Population bottlenecks result in loss of alleles that provide minimal selection advantage. 
A) Larger genes are more likely to display diversity than small genes. 
B) Genetic diversity is significant only when a population is isolated. 
C) Genetic disorders are more common in populations that have greater genetic diversity. 
D) Population bottlenecks result in loss of alleles that provide minimal selection advantage.

Question 10

What factors could increase genetic diversity in a particular population?

Accepted Answer

A) Genetic drift 
B) The population effect 
C) The bottleneck effect 
D) Increased number of haplotypes 
A) Genetic drift 
B) The population effect 
C) The bottleneck effect 
D) Increased number of haplotypes

Question 11

Why are people of Ashkenazi Jewish descent more likely to be carriers of the mutations that cause Tay-Sachs and Gaucher disease?

Accepted Answer

A) The environment of Eastern Europe increased their risk of developing a mutation. 
B) The common diet shared by these people has reduced their genetic diversity. 
C) Bottleneck effects have reduced the genetic diversity in this population. 
D) Being heterozygous for these diseases allowed them to survive cholera. 
A) The environment of Eastern Europe increased their risk of developing a mutation. 
B) The common diet shared by these people has reduced their genetic diversity. 
C) Bottleneck effects have reduced the genetic diversity in this population. 
D) Being heterozygous for these diseases allowed them to survive cholera.

Question 12

Why is it important to consider population genetics?

Accepted Answer

A) Natural selection can increase genetic diversity. 
B) Accurate assessment of a person's ethnicity can be identified from DNA. 
C) Disease risk can vary as a result of the geographic origin of one's ancestors. 
D) Knowing ethnicity allows accurate prediction of Huntington disease risk. 
A) Natural selection can increase genetic diversity. 
B) Accurate assessment of a person's ethnicity can be identified from DNA. 
C) Disease risk can vary as a result of the geographic origin of one's ancestors. 
D) Knowing ethnicity allows accurate prediction of Huntington disease risk.

Which practice is most likely to result in a change in the Hardy-Weinberg equilibrium of a population or geographic area?

What is the main purpose of population genetics?

What criteria must a population meet in order to stay in Hardy-Weinberg equilibrium?

What pieces of genetic information tend to be passed down from generation to generation with the least variation?

Which term refers to a random change in allele frequencies, not based on natural selection?

Agroup of eight space travelers, four men and four women, settled on the planet Zebulon. Their descendants had a very high rate of the autosomal-dominant disorder moonophilia distractens. What factor could explain this phenomenon?

Asmall group of people left their homeland and set sail for a tropical island. They settled there, and their descendants lived for many generations. Unfortunately,a relatively high proportion of this new population is afflicted with an autosomal-recessive disease. What would explain this?

The Black Death was a pandemic spreading across Europe between 1348 and 1350. Estimates state that 30% to 60% of Europe's population died from the Black Death.If welook at Europe's population before the pandemic and compare it to the population several generations later, what are we likely to find?

Which statement regarding genetic diversity is most accurate?

What factors could increase genetic diversity in a particular population?

Why are people of Ashkenazi Jewish descent more likely to be carriers of the mutations that cause Tay-Sachs and Gaucher disease?

Why is it important to consider population genetics?

DNA Structure and Function

Protein Synthesis

Genetic Influence on Cell Division, Differentiation, and Gametogenesis

Patterns of Inheritance

Epigenetic Influences on Gene Expression

Autosomal Inheritance and Disorders

Sex Chromosome and Mitochondrial Inheritance and Disorders

Family History and Pedigree Construction

Congenital Anomalies, Basic Dysmorphology, and Genetic Assessment

Enzyme and Collagen Disorders

Common Childhood-Onset Genetic Disorders

Common Adult-Onset Disorders

Cardiovascular Disorders

The Genetics of Cancer

Genetic Contributions to Psychiatric and Behavioral Disorders

Genetic and Genomic Testing

Assessing Genomic Variation in Drug Response

Health Professionals and Genomic Care

Financial, Ethical, Legal, and Social Considerations

Filters

Exam 20: Genetic and Genomic Variation

Which practice is most likely to result in a change in the Hardy-Weinberg equilibrium of a population or geographic area?

What is the main purpose of population genetics?

What criteria must a population meet in order to stay in Hardy-Weinberg equilibrium?

What pieces of genetic information tend to be passed down from generation to generation with the least variation?

Which term refers to a random change in allele frequencies, not based on natural selection?

Agroup of eight space travelers, four men and four women, settled on the planet Zebulon. Their descendants had a very high rate of the autosomal-dominant disorder moonophilia distractens. What factor could explain this phenomenon?

Asmall group of people left their homeland and set sail for a tropical island. They settled there, and their descendants lived for many generations. Unfortunately,a relatively high proportion of this new population is afflicted with an autosomal-recessive disease. What would explain this?

The Black Death was a pandemic spreading across Europe between 1348 and 1350. Estimates state that 30% to 60% of Europe's population died from the Black Death.If welook at Europe's population before the pandemic and compare it to the population several generations later, what are we likely to find?

Which statement regarding genetic diversity is most accurate?

What factors could increase genetic diversity in a particular population?

Why are people of Ashkenazi Jewish descent more likely to be carriers of the mutations that cause Tay-Sachs and Gaucher disease?

Why is it important to consider population genetics?

DNA Structure and Function

Protein Synthesis

Genetic Influence on Cell Division, Differentiation, and Gametogenesis

Patterns of Inheritance

Epigenetic Influences on Gene Expression

Autosomal Inheritance and Disorders

Sex Chromosome and Mitochondrial Inheritance and Disorders

Family History and Pedigree Construction

Congenital Anomalies, Basic Dysmorphology, and Genetic Assessment

Enzyme and Collagen Disorders

Common Childhood-Onset Genetic Disorders

Common Adult-Onset Disorders

Cardiovascular Disorders

The Genetics of Cancer

Genetic Contributions to Psychiatric and Behavioral Disorders

Genetic and Genomic Testing

Assessing Genomic Variation in Drug Response

Health Professionals and Genomic Care

Financial, Ethical, Legal, and Social Considerations

Filters