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chromosomal aberration, chromosomal anomaly, chromosonal disorder, chrosomal abnormality
any change in the normal structure or number of chromosomes; often results in physical or mental abnormalities
a twist or aberration; especially a perverse or abnormal way of judging or acting
chromosomal abnormality consisting of the absence of one chromosome from the normal diploid number
chrosomal abnormality in which there is one more than the normal number of chromosomes in a cell
any disease or abnormality that is determined by the sex hormones