X-Linked Recessive Inheritance Quiz
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Questions and Answers

Which statement best describes X-linked recessive inheritance?

  • Carrier males usually express the phenotype.
  • Affects mainly females due to having two X chromosomes.
  • Affected fathers can pass the trait to their sons.
  • Males must inherit one mutated X chromosome to be affected. (correct)

    • Why are X-linked recessive traits more commonly expressed in males than females?

  • Males possess only a single X chromosome. (correct)
  • Males receive two mutated X chromosomes from both parents.
  • Females have two Y chromosomes.
  • Males are less susceptible to genetic mutations.

    • In X-linked recessive inheritance, why do affected fathers not pass the trait to their sons?

  • Fathers only pass on mutated X chromosomes.
  • Fathers give Y chromosomes to their sons. (correct)
  • Sons inherit two X chromosomes from their fathers.
  • Sons always inherit the trait from their mothers.

    • How do females generally express X-linked recessive traits?

    <p>By inheriting two mutated X chromosomes from both parents.</p> Signup and view all the answers

    Why are males more susceptible to X-linked recessive disorders compared to females?

    <p>Males have only one X chromosome.</p> Signup and view all the answers

    What is the reason behind males being affected by an X-linked recessive disorder when inherited from mothers?

    <p>Sons inherit the responsible X chromosome from their mothers.</p> Signup and view all the answers

    Why do carrier females of X-linked recessive traits usually not express the phenotype?

    <p>They possess only one copy of the mutation.</p> Signup and view all the answers

    In X-linked recessive inheritance, what is the reason for no male-to-male transmission of the trait?

    <p>Affected fathers do not pass on the trait to sons.</p> Signup and view all the answers

    Which of the following contributes to males being more commonly affected by X-linked recessive traits?

    <p>'X' linked genes need two copies for expression in males.</p> Signup and view all the answers

    What is a key factor contributing to males being more vulnerable to X-linked recessive disorders compared to females?

    <p>Possessing only one copy of the responsible gene</p> Signup and view all the answers

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