Honey, why is our child's eyes blue, we both have brown eyes?
The doctor said that there is nothing to worry about, and that eye color is changed by the amount of melanin.
Most babies are born with blue eyes, regardless of the eye colors of their parents. In the early stages of life, newborns have not yet begun to make the dark brown pigment – called melanin – in the irises of their eyes. As babies get older, their eye color may change as they start producing melanin
Before your husband starts eyeing the milkman suspiciously, it would be good to keep in mind that most babies are born with blue eyes.
The doctor also told me that all blue-eyed humans have a single, common ancestor
The brown allele is always dominant over the green and blue alleles, the green allele is always dominant over the blue allele, and the blue allele is always recessive. Because of this, it is possible for two brown-eyed parents to have a child with a different eye color than theirs. For two brown-eyed parents to have a blue-eyed child, for example, the mother and father would need to pass on a pair of blue alleles each to their offspring
This is a pedigree chart of their family. As this shows that she is actually a carrier of the blue eyed trait and it gave the child a chance to have blue eyes. So it is not that rare that both of them are brown eyed and had a blue eyed baby
The mutation of brown eyes to blue represents neither a positive nor a negative mutation. It is one of several mutations such as hair colour, baldness, freckles and beauty spots, which neither increases nor reduces a human's chance of survival. As Professor Eiberg says, "it simply shows that nature is constantly shuffling the human genome, creating a genetic cocktail of human chromosomes and trying out different changes as it does so."