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Trisomy

Definition(s)

The presence of a single extra chromosome, yielding a total of three chromosomes of that particular type instead of a pair. Partial trisomy refers to the presence of an extra copy of a segment of a chromosome.

Definition from: GeneReviewsThis link leads to a site outside Genetics Home Reference. from the University of Washington and the National Center for Biotechnology Information

Related discussion in the Handbook

See also Understanding Medical Terminology.

 
Published: September 15, 2014