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Chapter 20

Charlene Morales 12 preguntas

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Preguntas del test (12)

  1. 1What is the main purpose of population genetics?
    1. ADetermining the factors that allow allelic frequencies to change over time
    2. BDetermining the geographic origins of specific genetic-based disorders
    3. CAssessing the effects of assortive mating on natural selection and evolution
    4. DAssessing the differences between race and ethnicity for susceptibility and resistance to infectious diseases
  2. 2What factors could increase genetic diversity in a particular population?
    1. AGenetic drift
    2. BThe population effect
    3. CThe bottleneck effect
    4. DIncreased number of haplotypes
  3. 3What criteria must a population meet in order to stay in Hardy–Weinberg equilibrium?
    1. ARandom mating, no migration, and no mutation
    2. BFounding commonalities and no haplotype differences
    3. CAssortative mating, migration, and frequent mutation
    4. DLimited procreation, no diet change
  4. 4What pieces of genetic information tend to be passed down from generation to generation with the least variation?
    1. AMitochondrial DNA
    2. BNuclear DNA
    3. CRibosomal DNA
    4. DHistone proteins
  5. 5Why is it important to consider population genetics?
    1. ANatural selection can increase genetic diversity.
    2. BAccurate assessment of a person’s ethnicity can be identified from DNA.
    3. CDisease risk can vary as a result of the geographic origin of one’s ancestors.
    4. DKnowing ethnicity allows accurate prediction of Huntington disease risk
  6. 6Which practice is most likely to result in a change in the Hardy–Weinberg equilibrium of a population or geographic area?
    1. ARandom mating from within the established population
    2. BGeographic isolation of the established population
    3. CAssimilation of immigrants into the existing population
    4. DPreponderance of autosomal-dominant traits in the existing population
  7. 7A 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?
    1. AEqual exposure to an environmental mutagen
    2. BHardy–Weinberg equilibrium
    3. CVariable expressivity
    4. DFounder effect
  8. 8A 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?
    1. AThey encouraged immigration of people from the mainland.
    2. BAn unidentified environmental radiation source was present on the island.
    3. COne of the original group members had the gene mutation from conception.
    4. DTheir lack of genetic diversity made them more vulnerable to new mutations
  9. 9The 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 we look at Europe’s population before the pandemic and compare it to the population several generations later, what are we likely to find?
    1. AMore genetic diversity in later generations
    2. BLess genetic diversity in later generations
    3. CLess genetic diversity in earlier generations
    4. DThe same degree of genetic diversity in later as in earlier generations
  10. 10Why are people of Ashkenazi Jewish descent more likely to be carriers of the mutations that cause Tay–Sachs and Gaucher disease?
    1. AThe environment of Eastern Europe increased their risk of developing a mutation.
    2. BThe common diet shared by these people has reduced their genetic diversity.
    3. CBottleneck effects have reduced the genetic diversity in this population.
    4. DBeing heterozygous for these diseases allowed them to survive cholera.

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Descripción
Genetics Midterm Test sobre Chapter 20, creado por Charlene Morales el 27/02/2019.
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