Both my parents have brown eyes. My older and younger siblings have brown eyes. I have green eyes. Is this genetically possible? Back in 1962, this was questionable and led to family problems, which have long since been resolved.
Of course it is possible. Your parents obviously have two different allels for the eye color (heterozygous), one recessive for green/blue eyes and one dominant, for brown eyes, which is expressed in this case beacuse dominant allel determines eye color if present. You and your siblings have inherited one allel from each parent. Your siblings have inherited at least one dominant (brown) allel from one of the parents, so they have brown eyes as well. You have inherited recessive allels for green eyes from both of them (homozygous). The chance to inherit two recessive allels in this case were 25%. I hope this helped you a bit :)