The Dominant Trait, Huntington Disease Causes Severe Neural/brain Damage at Approximately

Multiple Choice

The dominant trait, Huntington disease causes severe neural/brain damage at approximately age 40.A female whose mother has Huntington disease marries a male whose parents are normal.It is not known if the female has the disease.What is the probability that their firstborn will inherit the gene that causes Huntington disease?

A) 25%
B) 50%
C) 75%
D) 100%
E) 0%