Some people have a prominent dimple or crease in the front of the chin, called a cleft chin (or "butt chin"); others do not. This is sometimes said to be controlled by a single gene with two alleles, with cleft chin (C) dominant to smooth chin (S).

Cleft Chin. A cleft chin is identified by a small indentation or dimple in the center of the chin. It is also known as a botty chin or butt chin ( as its shape is similar to the butt) if the dimple is significant. Depending on personal preferences cleft chin …

2018年9月18日 · What is a cleft chin? A cleft chin refers to a chin with a Y-shaped dimple in the middle. It’s usually a genetic trait. Depending on your preference, you may consider cleft chins a...

A cleft chin is an inherited trait in humans and can be influenced by many factors. The cleft chin is also a classic example of variable penetrance [ 20 ] with environmental factors or a modifier gene possibly affecting the phenotypical expression of the actual genotype .

2024年4月29日 · What is the difference between a dimple chin and a cleft chin? A dimple chin features a small, natural indentation, while a cleft chin has a more pronounced Y-shaped division. Both are genetic traits.

Did you know humans are the only animals to have chins? They come in all shapes and sizes, but the most obvious difference from one chin to the next is whether they have a cleft or not. In those with a chin cleft, it can be very pronounced. Or it can be much more subtle, appearing simply as a small chin dimple.

2023年6月8日 · What actually causes cleft chin? When scientists first studied chin shapes in families, they observed that it was very rare for two smooth-chinned parents to have a child with a chin dimple. Children with cleft chins almost always had at least one parent with the trait. 1. From that, they predicted that a single gene determined chin shape.

2023年6月24日 · Cleft chins are caused by an underdeveloped bone structure in the chin. This leaves a gap between the right and left sides, creating a dimple or cleft. Cleft chins often run in families and are inherited genetically. However, it is possible for a child to have a cleft chin even if neither parent has one.

2024年12月6日 · One parent has a cleft chin, which is the dominant trait, represented as "CC", and the other has a no-cleft chin, which is the recessive trait, represented as "cc". All offspring from this cross will inherit one "C" allele from the cleft-chin parent and …

2024年6月16日 · The cleft chin allele is dominant, meaning it usually manifests itself even if only one copy is inherited, while the smooth chin allele is recessive and requires two copies to be expressed. So, if an individual has a cleft chin, they may have inherited two dominant alleles or one dominant and one recessive allele.