how can two blue eyed parents have kids with brown eyes?

Question

My parents both have blue eyes and my siblings and I all have brown eyes.

In: 5

Answer 1

If you look closely at eyes, there may be more than one color. If both of your parents are pure blue eyed without brown appearing pigment close to the iris with a fanning of blue (sometimes referred to as hazel eyes) it is unlikely that your father is biological. Two pure blue eyed parents will not have 3 brown eyed offspring naturally despite what many of the other commenters have said above. If however one or both of your parents eyes are hazel, the probability increases. Yes, the genetics are more complicated than bb bb vs Bb Bb punnet squares however the probability of two light eyed parents having 3 dark eyed offspring is very rare.