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1 month agoPeople in Florida can still marry their first cousin as bill fails to pass
One reason why many places have made marriage between first cousins illegal is an increased genetic risks for any children they might have. According to PET, children of first cousins are at an increased risk of "recessive" conditions, which are caused by the child inheriting two copies of a gene which carries the mutation. The risk is increased, because first cousins share 12.5 per cent of their genetic make-up, so could have inherited the same genetic mutation.