What is it called when you have two different colored eyes? Anyway, that’s my guess.

red hair?

AB negative blood type.

I'm AB positive which is the third rarest type

A twin....:0)

I agree with dees! LOL And rockypointdog, too.

But I'll guess green eyes.

Rusty

Perfect vision. ( I have a cousin with this. She brags about it as if it were an accomplishment LOL )

Have an extra thumb (6 fingers on the hand).

Lots of money!

I have green eyes, and I know that green eyes are very rare.

Ambidextrity

ESP

I also think it’s AB negative blood. I have it. It’s the universal recipient

Just so you know, navel oranges also cannot reproduce themselves and have to be grafted, as they make no seeds. Also, I think seedless watermelons cannot reproduce themselves.

I would go with red hair, even though it is common in my family. Both my brother and sister have red hair, as do many of my cousins.

Perfect pitch

Red Hair was my first thought, too.