Huntington's disease is a genetic disorder that can result in memory loss and abnormal body movements. Huntington's disease results from a defective gene (H) that is dominant to the allele that produces normal function (h). This means that... I. if someone is heterozygous for Huntington's disease, then he/she will be a carrier but will not have the disease. II. if a child has Huntington's disease, then at least one of his/her parents has the disease. III. if two parents do not have Huntington's disease, then their children will not have the disease. I only