Tracie just gave birth to her first child, Byron, and after much testing, doctors discovered Byron has muscular dystrophy. Neither Tracie nor her husband displays any signs of muscular dystrophy. How can you explain this?
Muscular dystrophy is a phenotype in both parents.
Muscular dystrophy is a genotype in both parents.
Muscular dystrophy runs in the mother's family.
Muscular dystrophy is a trait in both parents.