title: Cytological and molecular studies of nucleolar organizing region variants and recombination in trisomy 21.
authors.affiliation: Department of Obstetrics/Gynecology, University of Maryland School of Medicine, Baltimore 21201.
authors.forename: D
authors.initials: D
authors.lastname: Roulston
authors.forename: S E
authors.initials: SE
authors.lastname: Antonarakis
authors.forename: J G
authors.initials: JG
authors.lastname: Lewis
authors.forename: M M
authors.initials: MM
authors.lastname: Cohen
authors.forename: S
authors.initials: S
authors.lastname: Schwartz
mesh_terms: D015139:Blotting, Southern; D002874:Chromosome Mapping; D002891:Chromosomes, Human, Pair 21 / Q000648:ultrastructure; D003434:Crossing Over, Genetic; D015342:DNA Probes; D004314:Down Syndrome / Q000209:etiology / Q000235:genetics*; D005260:Female; D006801:Humans; D008297:Male; D008423:Maternal Age; D009630:Nondisjunction, Genetic; D009697:Nucleolus Organizer Region / Q000648:ultrastructure*; D010375:Pedigree; D011995:Recombination, Genetic
chemical_list: D015342:DNA Probes