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

For Silvia to have blond hair, both of her parents must have at least one recessive gene for blond hair color. This means that they can each have a dominant gene for brown hair, but also carry a recessive gene for blond hair, which they could pass on to their offspring.

Silvia Has Blond Hair,even Though Her Mother and Father Each