question_answer

Which of these statements about Huntington's disease is true?

A)  Genetic tests to detect the presence of the allele responsible for Huntington's disease do not exist at this time

B)  The onset of Huntington's disease is typically between birth and three year of age

C)  There is currently no effective treatment of Huntington's disease

D)  Huntington's disease is caused by the expression of a recessive allele