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

Why do most Arabs have curly hair? - Quora

Are white people with naturally curly hair part African? - Quora

Can white people have thick/coarse hair without it indicating African admixture? - Quora

Is curly hair considered an African hair or a Middle Eastern hair? - Quora

What race or ethnicity does curly hair come from? - Quora

What race or ethnicity does curly hair come from? - Quora

Can white people have thick/coarse hair without it indicating African admixture? - Quora

Why do white men like girls with curly hair? - Quora

Do Hispanic people have curly hair? - Quora

How can an Asian (guy) get soft/curly (like more diverse) hair like caucasian people? Asian hair is really rough and bounces back when you move it one way, and it's ugly when