Why do some people have dimples?

Why do some people have dimples?

Dimples are caused by a genetic variation affecting facial muscles, specifically the zygomaticus major. A split or double muscle creates a tether to the skin, which pulls inward when smiling, forming a visible indentation. It's considered a dominant trait, but inheritance can be complex.

Why It Matters

This fact belongs to the general category and contributes to expanding general knowledge. Understanding such facts not only makes you smarter but also helps connect ideas across different fields.

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