Sex Chromosome Abnormalities
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Questions and Answers

What type of abnormality can occur when a person is missing part of a sex chromosome?

  • Translocation
  • Duplication
  • Mutation
  • Deletion (correct)

    • What is often the reason for prenatal testing that may discover sex chromosome abnormalities?

  • Older age in the mother (correct)
  • Previous miscarriage
  • Family history of cancer
  • Family history of genetic disorders

    • At what stage may sex chromosome abnormalities not be diagnosed until?

  • Puberty (correct)
  • Adulthood
  • Birth
  • Adolescence

    • What is associated with sex chromosome abnormalities?

    <p>A range of physical and developmental problems</p> Signup and view all the answers

    What type of syndromes are associated with sex chromosome abnormalities?

    <p>Chromosomal syndromes</p> Signup and view all the answers

    What is the result of sex chromosome abnormalities?

    <p>A range of physical and developmental problems</p> Signup and view all the answers

    What is the characteristic of the X chromosome in females during interphase?

    <p>It is inactive and remains condensed</p> Signup and view all the answers

    What is the purpose of X inactivation in females?

    <p>To reduce the gene dosage of X-linked genes</p> Signup and view all the answers

    What is the characteristic of the Barr body?

    <p>It is an inactive X chromosome</p> Signup and view all the answers

    What is the sex chromosome composition of males and females in birds, moths, and butterflies?

    <p>Females: XY, Males: XX</p> Signup and view all the answers

    What is the term for the process by which one X chromosome is inactivated in females?

    <p>X inactivation</p> Signup and view all the answers

    What is the name of the scientist who discovered the Barr body?

    <p>Murray Barr</p> Signup and view all the answers

    What is the typical chromosomal composition of an individual with Turner syndrome?

    <p>44-XO</p> Signup and view all the answers

    What is the result of nondisjunction during anaphase in meiosis or mitosis?

    <p>Eggs with two X chromosomes or none</p> Signup and view all the answers

    What is the characteristic of an individual with 44-XXY chromosomal composition?

    <p>Klinefelter syndrome</p> Signup and view all the answers

    What is the role of the sex-determining region of the Y chromosome in sex determination?

    <p>It determines the development of testes</p> Signup and view all the answers

    What is the typical gender role adopted by XX individuals in a particular society?

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

    What is the characteristic of an individual with 47 chromosomes, commonly referred to as a superfemale?

    <p>Short and stocky</p> Signup and view all the answers

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