It's a black-and-white story. Two mixed-race sisters in Britain have both given birth to one white and one black child in what's being claimed as a million-to-one genetic fluke.

Thirty-five-year-old Sharon and her 40-year-old elder sister Sonia Harris each have two children, fathered by white men, the Daily Express reported. But even though Sonia's boys, Cameron and Kyle, are five-year-old twins, they have different-coloured skin and hair. Cameron has brown skin and dark brown curly hair while Kyle has white skin and is blond.