Is it likely I have a black gene too?

I can change from lighter than usual if it were snowing to a more tanned skin if it's very hot. Even though I'm relatively fair skinned (not white, just lighter), I've always noticed the top part of my hair is always nearly impossible to get it straightened. While the rest of my hair is wavy, that top part (on my forehead) is very curly, as if I had a tiny fraction of Afro hair. I have to brush it a lot and put gel on it.

I guess I wouldn't get surprised since many of us can for sure have a black ancestor, even if by a minor %. Even though I don't know any blacks in my family, is it likely I have black genes too?

Is it likely I have a black gene too?
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