I've heard that if one parent has a cleft chin there is a 50% chance any of his/her children will have a cleft chin. But I've also heard that if neither parent has a cleft chin then there is no possibility of the child belonging to those parents. In my case, I have 3 sons and only 1 has a cleft chin and dimples. My dad had a cleft chin and out of 6 of his children my brother and I are the only ones to have cleft chins. I would like to know If both parents have a cleft chin does that mean that all their children must have a cleft chin?
Neither of my parents have clefts but I do have one. And if both parents have a cleft, it is possible for them to have children without a cleft chin. The cleft chin trait is dominant, so if both parents were heterozygous with a cleft chin and both passed down the reccessive, or "little letter", then their children would not have a cleft.