Cleft chin is caused by a recessive gene. You need to have 2 copies of the gene (one from your mom and another from your dad) in order to develop cleft chin. Phenotypic expression of cleft chin is...
I actually don't know this 100% but I watched an episode of house where the son had known he had been adopted because he had a cleft chin and neither of his parents did. I find it hard to believe...
Actually, the answer is YES. If your child has a cleft chin, either you and the other parent have one of the traits to create the cleft. When both traits come together, the cleft is formed. So you...
Cleft chin is a dominant trait, but it also has a modifier gene. You know like those lamps that can be turned on but if there is a light switch it has to be in the on position for you to actually...