Back تكرار أحادي الأبوين Arabic Jednoroditeljska disomija BS Heterodisomia Catalan Uniparentale Disomie German Disomía uniparental Spanish Disomie uniparentale French דיזומיה חד הורית HE Disomia uniparentale Italian 片親性ダイソミー Japanese 단친 이염색체성 Korean
| Uniparental disomy | |
|---|---|
| Animation of uniparental isodisomy | |
| Specialty | Medical genetics |
Uniparental disomy (UPD) occurs when a person receives two copies of a chromosome, or of part of a chromosome, from one parent and no copy from the other.[1] UPD can be the result of heterodisomy, in which a pair of non-identical chromosomes are inherited from one parent (an earlier stage meiosis I error) or isodisomy, in which a single chromosome from one parent is duplicated (a later stage meiosis II error).[2] Uniparental disomy may have clinical relevance for several reasons. For example, either isodisomy or heterodisomy can disrupt parent-specific genomic imprinting, resulting in imprinting disorders. Additionally, isodisomy leads to large blocks of homozygosity, which may lead to the uncovering of recessive genes, a similar phenomenon seen in inbred children of consanguineous partners.[3]
UPD has been found to occur in about 1 in 2,000 births.[4]
- ^ Robinson WP (May 2000). "Mechanisms leading to uniparental disomy and their clinical consequences". BioEssays. 22 (5): 452–9. doi:10.1002/(SICI)1521-1878(200005)22:5<452::AID-BIES7>3.0.CO;2-K. PMID 10797485. S2CID 19446912.
- ^ Human Molecular Genetics 3. Garland Science. pp. 58. ISBN 0-8153-4183-0.
- ^ King DA (2013). "A novel method for detecting uniparental disomy from trio genotypes identifies a significant excess in children with developmental disorders". Genome Research. 24 (4): 673–687. doi:10.1101/gr.160465.113. PMC 3975066. PMID 24356988.
- ^ Nakka, Priyanka; Smith, Samuel Pattillo; O'Donnell-Luria, Anne H.; McManus, Kimberly F.; Agee, Michelle; Auton, Adam; Bell, Robert K.; Bryc, Katarzyna; Elson, Sarah L.; Fontanillas, Pierre; Furlotte, Nicholas A. (2019-11-07). "Characterization of Prevalence and Health Consequences of Uniparental Disomy in Four Million Individuals from the General Population". The American Journal of Human Genetics. 105 (5): 921–932. doi:10.1016/j.ajhg.2019.09.016. ISSN 0002-9297. PMC 6848996. PMID 31607426.