Examples of X-Linked Inheritance Diseases Quiz
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Questions and Answers

What is the probability that sons of an affected man and a carrier mother will be affected by an X-linked recessive disease?

  • 25%
  • 75%
  • 100%
  • 50% (correct)
  • Which of the following is NOT an X-linked recessive disease?

  • Marfan syndrome (correct)
  • Fragile X syndrome
  • Lesch Nyhan syndrome
  • Wiscott-Aldrich syndrome
  • If a daughter of an affected man inherits his mutated X chromosome, what is the potential outcome?

  • She will be affected.
  • She will have a 75% chance of being affected.
  • She will be a carrier. (correct)
  • She will be unaffected.
  • Which of the following diseases exhibits X-linked recessive inheritance?

    <p>Duchenne muscular dystrophy</p> Signup and view all the answers

    What is the probability that sons of an affected man and an affected mother will be affected by an X-linked recessive disease?

    <p>100%</p> Signup and view all the answers

    How do daughters of an affected man and carrier mother differ in their outcomes in X-linked recessive inheritance?

    <p>Some are carriers and some are affected.</p> Signup and view all the answers

    Why can affected fathers not pass X-linked recessive traits to their sons?

    <p>Because fathers give Y chromosomes to their sons</p> Signup and view all the answers

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

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

    What happens when a female is a carrier for an X-linked recessive disorder?

    <p>She will not pass the disorder to her sons</p> Signup and view all the answers

    Why does male-to-male transmission of X-linked recessive traits not occur?

    <p>Fathers give Y chromosomes to their sons</p> Signup and view all the answers

    How many mutated X chromosomes do females need to be affected by an X-linked recessive trait?

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

    Why are males who inherit an affected X chromosome from their mother more likely to exhibit X-linked recessive traits?

    <p>Because they lack a second X chromosome to compensate for the mutation</p> Signup and view all the answers

    What is true about X-linked dominant inheritance?

    <p>One copy of the allele is sufficient to cause the disorder</p> Signup and view all the answers

    Which of the following statements is correct regarding X-linked dominant inheritance?

    <p>Mothers with the trait will always have affected daughters</p> Signup and view all the answers

    In X-linked dominant inheritance, if the father is affected by a disorder, which offspring will be affected?

    <p>Only daughters</p> Signup and view all the answers

    What happens if a mother with an X-linked dominant disorder has a son?

    <p>The son will always be affected</p> Signup and view all the answers

    Which of the following is NOT a characteristic of X-linked dominant inheritance?

    <p>Affects more females than males</p> Signup and view all the answers

    In X-linked dominant inheritance, what is the inheritance pattern when both parents have the disorder?

    <p>Sons have a chance to be affected depending on the type of X chromosome inherited</p> Signup and view all the answers

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