Huntington's Disease Tends to Strike Earlier and Lead to a More

Multiple Choice

Huntington's disease tends to strike earlier and lead to a more rapid progression of symptoms as it moves from generation to generation. Also, it tends to strike earlier and progress more rapidly when it is passed from the father to his children rather than from the mother. Which genetic phenomenon (or phenomena) is/are likely operating here? (Select all that apply.)

A) incomplete penetrance
B) sex-limited inheritance
C) genetic anticipation
D) parental imprinting
E) epistasis