Arches. Photo by Daniel Chia
HOPES: Huntington's Outreach Project for Education, at Stanford

HD allele

A version of the Huntington gene that contains a higher than normal number of repeats. Individuals with the HD allele will develop Huntington’s disease (Note that there are many different alleles that can cause HD, but for simplicity, this site refers to any allele that causes HD as the HD allele.) This allele may be called the mutant Huntington allele in other places.