「The Genetics of Dimples. The Inheritance Pattern of Cheek Dimples and Chin Dimples」の版間の差分

2016年7月27日 (水) 17:19時点における版

Dimples is the word provided to any natural indentation or dent on the body, but usually refers to the face. They are most often visible when someone smiles. They certainly are a genetic trait following an autosomal dominant pattern of inheritance.
Dimples can be present on both cheeks or one, and some people have them on their own chin. Like all physical traits that you possess you have two genes for the kids. One inherited from a father and one from your mother. The way that an actual trait is expressed, thus the way you look is because of either a combination of dominant genes, a dominant plus a recessive gene or two recessive genes.
The genetics of dimples follows a dominant pattern of inheritance, in other words that a child only needs to inherit one dominant gene for dimples to own them. When someone discusses a gene for dimples they mean a gene or set of genes that can produce the physiological and anatomical changes that result in these skin indentations. So what will be the chances a child may inherit them?
If both parents have dimples then there's a 50-100% chance that their son or daughter will.
If the dad has dimples and the mother doesn't, then your child has a 25-50% potential for inheriting dimples.
If mom has dimples and the daddy does not, then your child carries a 25-50% potential for inheriting dimples.
If both dad and mom don't have dimples then the youngster will not, unless you will find there's spontaneous genetic mutation.




Whilst expensive is known about the genetics of dimples, there's been limited research for the anatomy of dimples; how the skin and underlying muscles form these indentations. There certainly are a girls whatsapp number of numerous schools of thought.




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It could be that dimples are formed due to the presence of shorter muscles nearby the cheeks then when they contract (if you smile) pull on the overlying skin. Others opt for variations inside the facial muscle called Zygomaticus major. It begins as a single muscle, but during development moves and becomes two. The inferior Zygomaticus major muscle lies above the corner from the mouth and the inferior Zygomaticus major muscle sits below the corner from the mouth. Variations in the shape and size of the two muscles could be the cause of dimples.
There's a much easier reason behind the inheritance of your dimpled chin. It's caused by an indentation inside the jaw bone.
C. Szeto -released under Creative Commons License