title: Nucleolus organizing genes on chromosome 21: recombination and nondisjunction.
authors.forename: R D
authors.initials: RD
authors.lastname: Schmickel
authors.forename: I L
authors.initials: IL
authors.lastname: Gonzalez
authors.forename: J M
authors.initials: JM
authors.lastname: Erickson
mesh_terms: D001483:Base Sequence; D002904:Chromosomes, Human, 21-22 and Y; D003001:Cloning, Molecular; D004275:DNA, Ribosomal / Q000235:genetics; D004314:Down Syndrome / Q000235:genetics*; D006801:Humans; D008540:Meiosis; D009630:Nondisjunction, Genetic; D009690:Nucleic Acid Conformation; D009697:Nucleolus Organizer Region; D011995:Recombination, Genetic; D014178:Translocation, Genetic
chemical_list: D004275:DNA, Ribosomal