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The XX chromosome that in reproductive tissues results in production of eggs, and the XY chromosome that results in sperm production, are also present in all body cells.

Years after the discovery of her uterus, Annalise learned she was born with a mix of both XX and XY chromosomes.

He has diagnosed males who have XX chromosomes - which are normally found in females.

Staneva's 'X' was reportedly said to have symbolised female XX chromosomes.

A: "So basically what level of chromosome marries up with XX XY. Based on that criteria. You've seen that in technical competition rules. So if you look at that you'll see what that means."