Which of the Following Is True About Huntington Disease

Multiple Choice

Which of the following is true about Huntington disease?

A) Symptoms typically appear between the ages of 10 and 20 years.
B) Individuals have a 25% chance of inheriting the condition from an affected parent.
C) Many individuals have already had children before developing the disorder.
D) Most affected individuals are homozygous for the gene (HH) .
E) Once symptoms appear, the disease progresses very rapidly.