This is an inherited trait in humans, where the dominant gene causes the cleft chin while the homozygous recessive geneotype presents without a cleft. However, it is also a classic example for variable penetrance[1] with environmental factors or a modifier gene possibly affecting the phenotypical expression of the actual genotype.
See also
References
- ^ Starr, Barry. Ask a Geneticist. Understanding Genetics. TheTech. Retrieved on 2007-07-01.
