I am learning about genes and heritage currently and I am a bit baffled about something. In my book it states that in a plant's gene, if S is for smooth leaves and s for rough leaves, then we get these combinations: Code (Text): Parent plant | Child plant | Dominant alleles S + s -> Ss -> S s + S -> sS -> S S + S -> SS -> S s + s -> ss -> s So the only way to get a plant with smooth leaves is if both parents have the recessive gene s. But what happens when it comes to eye color? If we say that for brown eyes we have B and for blue eyes we have b then how can we get blue eyed children from brown eyed parents? For example: Code (Text): Parent | Child | Dominant alleles B + b -> Bb -> B b + B -> bB -> B B + B -> BB -> B b + b -> bb -> b So the only way for a kid to get blue eyes is the two parents have blue eyes, according to my table. In any other case the kid has brown eyes. This ofcourse is wrong as I know families where the parents have brown eyes and some of their children have blue eyes. So where did I do wrong?