Actually I agree with Beletje..... Its down to genetics... Which I have studied in horses and basic rules apply in humans too.
Blue eyes are recessive, brown eyes dominant. For a child to have blue eyes they MUST have received a blue eyed gene from BOTH parents. If they receive one brown gene their eyes will be brown... Even if they receive one brown and one blue. Because the brown gene is dominant over any blue gene. Can only have blue eyes with two blue genes....no brown in there.
Therefore if someone has blue eyes... They can't carry a brown eyed gene and therefore cannot pass on brown eyes to their off spring. So if you have two blued eyed parents... They cannot have a child with brown eyes. The law of genetics tells us this.
But I think that for the sake if a film we can overlook this for artistic interpretation..... More important that they cast children who could fill the role...it is only a film after all not real. Lol. :-)
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