• Question: why are people born with 2 different colour eyes.

    Asked by 373dagk48 to Katherine on 9 Nov 2017.
    • Photo: Katherine Benson

      Katherine Benson answered on 9 Nov 2017:

      This is called heterochromia iridis and is often caused by something called a genetic mosaic. People with two colour eyes have cells in each eye with different DNA mutations in them, one for each colour.

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