Silvia has blond hair, even though her mother and father each have brown hair. What do we know about Silvia's parents?

Question

Quizplus · Accepted Answer

To have blond hair, Silvia must inherit two recessive genes for blond hair from each parent. This means that each of her parents must carry at least one recessive gene for blond hair, even if they have brown hair themselves. Therefore, option B is the best choice.

Silvia Has Blond Hair, Even Though Her Mother and Father