Fact Set HD is an autosomal dominant genetic disorder. Persons with the allele for HD will at some time develop symptoms. The usual age of onset is between 35 and 45. HD involves progressive degeneration of nerve cells in the central nervous system. HD is fatal with death occurring somewhere in the 50's age range.
Variability is present in the expression of the disorder.
Draw the pedigree for Nancy. Include her mother, father and sister. Indicate which members of the family have the disease. Give three reasons to support your decision in question 2. 4. Nancy is applying for life insurance.