Huntington's disease is caused by inheritance.
A genetic disorder is a genetic problem caused by one or more abnormalities in the genome , especially a condition that is present from birth ( congenital ) . Genetic disorders may be hereditary , passed down from the parents ' genes . In such cases , the defect will only be passed down if it occurs in the germ line . Huntington 's disease ( HD ) , also known as Huntington 's chorea , is an inherited disorder that results in death of brain cells .