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Definition of Heterotrisomy

Heterotrisomy: Trisomy of different chromosomes. The occurrence of two children in the same family, one with trisomy 18 and the other with trisomy 21, is an instance of heterotrisomy.

See also: Homotrisomy.

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=38320
Last Editorial Review: 10/9/2012

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