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.
Huntington's disease is commonly thought to be a hereditary neurodegenerative disease caused by the misfolding of certain proteins, which lose their normal structure and cannot be disposed of by the body. The mutant proteins then accumulate in the brain, where they eventually become toxic to nerve cells.