Autosomal Dominant Inheritance Patterns Quiz
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Questions and Answers

In autosomal dominant inheritance, what is the chance of an affected parent passing the affected allele to their offspring?

  • 75%
  • 50% (correct)
  • 100%
  • 25%
  • Which disorder is caused by a mutation in the low-density lipoprotein receptor?

  • Marfan syndrome
  • Achondroplasia
  • Hypercholesterolemia (correct)
  • Huntington disease type 2
  • What is the likely genotype of affected individuals in autosomal dominant inheritance?

  • AA
  • Not determinable
  • aa
  • Aa (correct)
  • Which type of inheritance pattern has an equal likelihood of both sexes being affected?

    <p>Autosomal recessive inheritance</p> Signup and view all the answers

    What is the cause of Tuberous sclerosis?

    <p>Mutations in the TSC1 and TSC2 genes</p> Signup and view all the answers

    Which genetic disorder is caused by mutations in the NF1 gene?

    <p>Neurofibromatosis, type 1 (NF1)</p> Signup and view all the answers

    In mitochondrial inheritance, why are all children of an affected female expected to express the disease?

    <p>Because mitochondrial DNA is only inherited from the mother, leading to 100% penetrance in all children.</p> Signup and view all the answers

    What is the characteristic of X-linked dominant disorders that leads to affected males not passing the disease to their sons?

    <p>The fact that males are hemizygous for genes on the X chromosome.</p> Signup and view all the answers

    Why do generations may be skipped in the expression of X-linked recessive disorders if all offspring are heterozygotes?

    <p>Because of the random inactivation of X chromosomes in females.</p> Signup and view all the answers

    What causes Albinism, a rare autosomal recessive disorder?

    <p>Loss of melanocyte tyrosinase</p> Signup and view all the answers

    Which disorder is caused by mutations in a specific collagen gene and follows an X-linked recessive inheritance pattern?

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

    What is the likelihood of an individual being a carrier of Albinism, an autosomal recessive disorder?

    <p>1 in 2</p> Signup and view all the answers

    Why do sons and daughters both have a 50% chance of inheriting the mutated allele from their mothers in X-linked recessive disorders?

    <p>Because males are hemizygous for genes on the X chromosome.</p> Signup and view all the answers

    Why will affected males not pass an X-linked dominant disorder to their sons?

    <p>Males are hemizygous for genes on the X chromosome.</p> Signup and view all the answers

    "Hypophosphatemic rickets" is a disorder caused by mutations in which type of inheritance pattern?

    <p>X-linked dominant inheritance</p> Signup and view all the answers

    What characteristic feature leads to mitochondrial disorders being maternally inherited?

    <p>Inheritance of mitochondria only from the mother</p> Signup and view all the answers

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