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NUR 4160 Genetic And Genomic Variation Practice Questions CH20

John Marsh
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Nova Southeastern University

Genetics For Nursing Practice (NUR 4160)

Genetic and Genomic Variation Practice Questions CH20

Chapter 20: Genetic and Genomic Variation
Multiple Choice
Identify the choice that best completes the statement or answers the question.
__A.__ 1. What is the main purpose of population genetics?
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
__D.__ 2. What factors could increase genetic diversity in a particular population?
A. Genetic drift
B. The population effect
C. The bottleneck effect
D. Increased number of haplotypes
__A.__ 3. What criteria must a population meet in order to stay in Hardy–Weinberg equilibrium?
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.__ 4. What pieces of genetic information tend to be passed down from generation to generation with
the least variation?
A. Mitochondrial DNA
B. Nuclear DNA
C. Ribosomal DNA
D. Histone proteins
__C.__ 5. Why is it important to consider population genetics?
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.
__C.__ 6. Which practice is most likely to result in a change in the Hardy–Weinberg equilibrium of a
population or geographic area?
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
__D.__ 7. A group 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?
A. Equal exposure to an environmental mutagen
B. Hardy–Weinberg equilibrium
C. Variable expressivity
D. Founder effect
__C.__ 8. A small 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?
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.



NUR 4160 Genetic And Genomic Variation Practice Questions CH20

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