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| Uniparental Disomy Disomy, Uniparental | Uniparental Heterodisomy | Uniparental Isodisomy | Disomies, Uniparental | Heterodisomies, Uniparental | Heterodisomy, Uniparental | Isodisomies, Uniparental | Uniparental Disomies | Uniparental Heterodisomies 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 (NONDISJUNCTION, GENETIC) events during MEIOSIS. The disomy may be composed of both homologous chromosomes from one parent (heterodisomy) or a duplicate of one chromosome (isodisomy). |