The gene for brown eyes is dominant, and the gene for blue eyes is recessive. A woman who has brown eyes and a man who has blue eyes have a child who has blue eyes. What are the genotypes of the
parents? Could this couple also have a brown-eyed child?

Explanation:

As you'll see, this is usually when a trait is on the X chromosome. Dominant and Recessive. Let's say that a child has a mom with brown eyes and dad with blue eyes. Since brown eyes are dominant, the mom can have either one brown (B) and one blue (b) version of an eye color gene or she can have two browns.

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explanation: