Residents of the District of Columbia lack full democratic representation in the U. S. Senate or the U.S. House of Representatives. Representation in Congress is limited to a non-voting delegate to the House of Representatives and a shadow Senator.
Huntington's disease is a progressive brain disorder caused by a single defective gene on chromosome 4 â one of the 23 human chromosomes that carry a personâs entire genetic code. This defect is dominant, meaning that anyone who inherits it from a parent with Huntington's will eventually develop the disease.
Summary. 1  Huntingtonâs disease is a neurological (nervous system) condition caused by the inheritance of an altered gene. 2  Symptoms often donât appear until the person is in their thirties or forties and not all people with Huntington's disease experience the same symptoms.