Another thing that's weird is being born with blond hair and blue eyes. After all, the vast majority of the human species has black hair and brown eyes, so surely black hair & brown eyes are normal and people who don't have those characteristics are weird? Well, aren't we?
It's actually quite difficult to be born with blond hair & blue eyes: the genes for dark hair & eyes are dominant so you need to inherit
two sets of the appropriate genes, one from each parent, in order to be born with blond hair & blue eyes. This is what's commonly known as 'recessive traits' or 'recessive genes'.
My father had black hair & brown eyes. My mother had brown hair & blue eyes. So for me to be born with blond hair & blue eyes, I had to inherit those genes from two parents who didn't show any outward signs of having them. So am I weird? Am I a mutant? Am I an X-Man (god, I hope so - I could do with some superpowers!).
Or are our less-common characteristics - such as blond hair, or being one of identical twins, or being transsexual - merely interesting examples of the incredible variety of the human species?
Aren't humans amazing?
