For a child to inherit red ... hair." But with redheads making up only 1 to 2 per cent of the global population, it's an increasingly rare blessing. "The likelihood of the recessive gene being ...

In non-Gattaca terms, that means even if a gene that signals brown hair is dominant in your family, another gene for red hair may still be present in your genetic code. So if you've got a red ...

Your father has brown hair. Your mother’s a blonde. And you somehow ended up with flaming red hair. It’s all thanks ... which is barely present in any of the other hair colors.