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Glossary Term
Glossary Term Trisomy
Definition The condition of having three chromosomes of a particular type. Down Syndrome in humans is a trisomy for chromosome 21.
See also Monosomy.

Contributing Projects:
Mouse Genome Database (MGD), Gene Expression Database (GXD), Mouse Models of Human Cancer database (MMHCdb) (formerly Mouse Tumor Biology (MTB), Gene Ontology (GO)
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last database update
MGI 6.17
The Jackson Laboratory