An Individual with a Father Who Developed Huntington's Disease and a Mother

Multiple Choice

An individual with a father who developed Huntington's disease and a mother who was never at risk for it will develop the disease unless she

A) inherited a normal allele from her mother and none from her father.
B) inherited only the dominant allele from her father and none from her mother.
C) experienced significantly different environmental conditions from her father.
D) experienced a significant genetic mutation at the time of fertilization.