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trisomy

DEFINITIONS OF: trisomy

1

n chrosomal abnormality in which there is one more than the normal number of chromosomes in a cell

Types:
Down syndrome, Down's syndrome, mongolianism, mongolism, trisomy 21
a congenital disorder caused by having an extra 21st chromosome; results in a flat face and short stature and mental retardation
Type of:
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
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