Huntington's Disease is an autosomal dominant disorder, requiring only one mutated gene copy. In contrast, Cystic Fibrosis and Sickle Cell Anemia are recessive disorders, necessitating two mutated gene copies. Hemophilia is typically an X-linked recessive disorder.
A diseased man marries a normal woman. They get three daughter and five sons. All the daughter were diseased and sons were normal.The gene of this disease is