Mendelian and Multifactorial Traits Quiz
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Questions and Answers

How many pairs of autosomes does a human somatic cell have?

  • 24
  • 23
  • 21
  • 22 (correct)
  • What does the Y chromosome determine in humans?

  • Both femaleness and maleness
  • Maleness (correct)
  • Femaleness
  • Non-sex characteristics
  • What do cells differ in despite containing the entire genome?

  • Number of chromosomes
  • Ability to replicate
  • Appearance and activities (correct)
  • Location in the body
  • What structures are formed when DNA molecules wrap tightly around proteins?

    <p>Chromosomes</p> Signup and view all the answers

    What is a polymorphism as described in the text?

    <p>A variant in DNA sequence present in at least 1 percent of a population</p> Signup and view all the answers

    What are single nucleotide polymorphisms (SNPs) primarily used for?

    <p>Estimating disease risk based on genetic variations</p> Signup and view all the answers

    What is the primary focus of genome-wide association studies mentioned in the text?

    <p>Tracking combinations of genetic landmarks associated with disorders</p> Signup and view all the answers

    How do SNPs differ from mutations as explained in the text?

    <p>SNPs mark genetic variations, while mutations can cause diseases</p> Signup and view all the answers

    Why is it important to know whether a trait or illness is single-gene or multifactorial?

    <p>To determine the risk of occurrence in a particular family member</p> Signup and view all the answers

    What makes predicting the recurrence of a multifactorial trait or disorder challenging?

    <p>Multiple genes and environmental factors are involved</p> Signup and view all the answers

    How does osteoporosis exemplify the complexity of multifactorial diseases?

    <p>Several genes and lifestyle factors contribute to it</p> Signup and view all the answers

    Why are results of predictive testing for inherited disease presented as risks rather than foregone conclusions?

    <p>The environment can modify gene expression</p> Signup and view all the answers

    What is one of the fears of biotechnology that Alexis Rockman captures in his art?

    <p>Pigs incubating spare parts for sick humans</p> Signup and view all the answers

    What does the field of metagenomics aim to reveal and describe?

    <p>Interactions between different species</p> Signup and view all the answers

    Where was one of the first metagenomics projects conducted to describe life?

    <p>Sargasso Sea</p> Signup and view all the answers

    What misconception did Christopher Columbus have about the Sargasso Sea?

    <p>He mistook the seaweed for abundant fish</p> Signup and view all the answers

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