You should be judged differently because of the way you are born. Ie criminality inherited - although of course need not say anything about genes. Famous case of Siamese cat. However, seems to be a thing that baffles the law. Well known - Japanese tolerance to alcohol.
Most Japanese alcoholics have western form of the gene.
California Bar Association. He was an alcoholic, but knew this was no defence. Assumed he would be struck off. Spoke to his own lawyer. Two stage trial - guilt and sentencing.