Can two blue-eyed parents produce a brown-eyed child? If yes, why is this so?

Question

I learnt in class that for a person to show blue eyes they must have two recessive blue eye genes. However, some sites have said that it’s possible for two blue eyed parents to have a brown eyed child?

In: Biology

Answer 1

Mutation can occur in any gene at any generation. While in general blue-eyed parents have blue-eyed children (because brown is dominant) all genetic traits are subject to mutation, that’s where blue eyes came from in the first place.