Ruth's Physician Informed Her That a Single Dominant Gene on Chromosome

Multiple Choice

Ruth's physician informed her that a single dominant gene on chromosome 4 transmits her condition. She was also informed that if one of her parents had the gene, she stood a 50% chance of inheriting the gene and developing the disorder. Which disorder does Ruth likely have?

A) Huntington's disease
B) Parkinson's disease
C) Alzheimer's disease
D) Pick's disease