How is it possible that some Caucasian people have very curly hair

Are red, curly headed people rare? - Quora

How is it possible that some Caucasian people have very curly hair? - Quora

Why don't Chinese people usually have curly hair? - Quora

Why do black people have curly hair? - Quora

Is curly hair common in Mexico? - Quora

What do you think that is the meaning of having curly hair? - Quora

Why do most Arabs have curly hair? - Quora

Can white people have curly hair naturally? - Quora

How is it possible that some Caucasian people have very curly hair? - Quora

Why do Irish People have curly hair? - Quora

Can a person be black who has very white skin and no African facial features (not albinism) and no frizzy/curly hair be black? I see people claim they are black, but not

Is it rare if you have natural curly hair (woman)? - Quora