「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) 21:08時点における版

Dimples is the word directed at any natural indentation or dent on the human body, truly refers to the face. They are most commonly 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 several people have them on his or her chin. Like all physical traits which you possess you have two genes for the kids. One inherited from the father and one out of your mother. The way that a physical trait is expressed, so because of this the way you look is caused by either a combination of dominant genes, a dominant and a recessive gene or two recessive genes.
The genetics of dimples follows a dominant pattern of inheritance, this means that a child only needs to inherit one dominant gene for dimples to get them. When someone references a gene for dimples they mean a gene or list of genes that will produce the physiological and anatomical changes that lead to these skin indentations. So what will be the chances that the child may inherit them?




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If both dad and mom have dimples then there's a 50-100% chance that their son or daughter will.
If the daddy has dimples as well as the mother doesn't, then a child includes a 25-50% potential for inheriting dimples.
If mom has dimples and the dad does not, then a child includes a 25-50% probability of inheriting dimples.
If both parents don't have dimples then the youngster will not, unless there is a spontaneous genetic mutation.




Whilst much will known concerning the genetics of dimples, there's been limited research for the anatomy of dimples; how the skin and underlying muscles form these indentations. There are a number of schools of thought.




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It could be that dimples are formed due to presence of shorter muscles nearby the cheeks and when they contract (when you smile) pull on the overlying skin. Others go for variations within the facial Dating girls muscle called Zygomaticus major. It starts out as a single muscle, but during development moves and becomes two. The inferior Zygomaticus major muscle is defined above the corner from the mouth along with the inferior Zygomaticus major muscle sits below the corner from the mouth. Variations inside shape and size of those two muscles may be the source of dimples.
There's a lot easier explanation for the inheritance of a dimpled chin. It's brought on by an indentation in the jaw bone.
C. Szeto -released under Creative Commons License