The nurse is explaining the inheritance of Huntington disease to a newly diagnosed patient whose partner does not have the gene mutation. Which statement should the nurse make regarding family planning?
A) There is a 0% chance with each pregnancy that the child will inherit the gene for Huntington disease.
B) There is a 25% chance with each pregnancy that the child will inherit the gene for Huntington disease.
C) There is a 50% chance with each pregnancy that the child will inherit the gene for Huntington disease.
D) There is a 100% chance with each pregnancy that the child will inherit the gene for Huntington disease.
C) There is a 50% chance with each pregnancy that the child will inherit the gene for Huntington disease.
Explanation: A) Dominant inheritance indicates that only one copy of a mutated gene is required to cause disease. When a parent has an autosomal dominant gene mutation, there is a 50% chance in each pregnancy that the child will inherit the mutation and manifest disease.
B) Dominant inheritance indicates that only one copy of a mutated gene is required to cause disease. When a parent has an autosomal dominant gene mutation, there is a 50% chance in each pregnancy that the child will inherit the mutation and manifest disease.
C) Dominant inheritance indicates that only one copy of a mutated gene is required to cause disease. When a parent has an autosomal dominant gene mutation, there is a 50% chance in each pregnancy that the child will inherit the mutation and manifest disease.
D) Dominant inheritance indicates that only one copy of a mutated gene is required to cause disease. When a parent has an autosomal dominant gene mutation, there is a 50% chance in each pregnancy that the child will inherit the mutation and manifest disease.
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