disomy uniparental disomy http://purl.bioontology.org/ontology/MESH/D024182 http://purl.bioontology.org/ontology/SNOMEDCT/726400003 http://purl.obolibrary.org/obo/HP_0032382 http://purl.obolibrary.org/obo/NCIT_C85215 http://purl.obolibrary.org/obo/VariO_0209 https://en.wikipedia.org/wiki/Uniparental_disomy https://www.wikidata.org/wiki/Q1207929 The presence in a cell of two paired chromosomes from the same parent, with no chromosome of that pair from the other parent. This chromosome composition stems from non-disjunction events during meiosis. The disomy may be composed of both homologous chromosomes from one parent (heterodisomy) or a duplicate of one chromosome (isodisomy). UPD uniparental disomies