Huntington's: The Disease

Discover how Huntington's disease is passed on through a single gene. How does it progress, what are the symptoms and is there a treatment? Biology - Cells And DNA - Learning Points. Huntington's disease is a genetic disorder that is passed on through a single dominant gene. Huntington's disease causes progressive damage to the brain and nervous system and is fatal. A dominant allele will always be expressed, even if only one copy is present. If one parent carries just one copy of the faulty gene then there is a 50:50 chance that each child will inherit the disease. A Twig Context Film. Reinforce and extend the learning required by the curriculum. Twig’s context films show abstract concepts in action in the real world.