This is an inherited trait in humans, where the recessive gene causes the cleft chin, while the dominant genotype presents without a cleft. However, it is also a classic example for variable penetrance with environmental factors or a modifier gene possibly affecting the phenotypical expression of the actual genotype. Cleft chins are common among people originating from Europe and the Middle East.
where does the dimple in the chin come from
inherited trait in humans, where the recessive gene causes the cleft chin