Why does Huntington’s disease have a heritability ratio of 1.0?
a. The gene that causes Huntington’s disease is dominant.
b. In families where Huntington’s disease is prevalent, it tends to appear at least once every generation.
c. If someone inherits the gene for Huntington’s disease, it is inevitable that he/she will acquire the disease.
d. Because of environmental influences, it is difficult to predict if someone will acquire the disease despite having the diseased allele.
ANSWER:
c
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