Human Genetics: Inheritance of Single-Gene Differences
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Questions and Answers

What is a major limitation of using humans as research subjects in genetics?

  • Their ability to interbreed randomly
  • Their short life cycle
  • Their ability to be subjected to rigorous experimental conditions
  • Their long life cycle (correct)

    • Which of the following is NOT a method used to study human genetics?

  • Randomized controlled trials (correct)
  • Karyotyping
  • DNA sequencing
  • Pedigree Analysis

    • What can be detected through karyotyping?

  • Mode of transmission of hereditary traits
  • Numerical and structural abnormalities (correct)
  • Risks of having affected offspring
  • Dominance or recessiveness of alleles

    • What type of inheritance pattern is characterized by the trait never skipping a generation?

    <p>Autosomal Dominant</p> Signup and view all the answers

    What is the primary method used in human genetics?

    <p>Pedigree Analysis</p> Signup and view all the answers

    What type of marriage would produce offspring that are also affected by the trait?

    <p>Marriage between two affected individuals</p> Signup and view all the answers

    What is the characteristic of metacentric chromosomes in terms of centromere position?

    <p>centromeres in the middle of the chromosome</p> Signup and view all the answers

    Which group of human chromosomes has a medium size and acrocentric centromere location?

    <p>Group D</p> Signup and view all the answers

    What is the chromosomal composition of Turner's Syndrome?

    <p>22II+ X0</p> Signup and view all the answers

    Which type of chromosomal aberration is characterized by 22II+ I21+ XX or XY?

    <p>Down's Syndrome</p> Signup and view all the answers

    What is the centromere location of chromosomes in Group G?

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

    Which of the following chromosomal aberrations is characterized by 22II+XXX?

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

    What is the key characteristic of Autosomal Dominant inheritance?

    <p>No skipping of generations is observed</p> Signup and view all the answers

    What is the most likely explanation for the occurrence of cystic fibrosis in a population?

    <p>Matings between heterozygotes</p> Signup and view all the answers

    What is the pattern of inheritance observed in Sex-linked Recessive traits?

    <p>Affected families with unaffected husbands transmit the trait to sons only</p> Signup and view all the answers

    What is the key difference between Autosomal Dominant and Autosomal Recessive inheritance?

    <p>The presence of skipping of generations</p> Signup and view all the answers

    What is the probability of having a child with an autosomal recessive disorder if both parents are carriers of the gene?

    <p>1 in 4</p> Signup and view all the answers

    What is the reason for increased consanguinity between parents in Autosomal Recessive Disorders?

    <p>Because most matings are with relatives</p> Signup and view all the answers

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