title: Single-copy sequence hybridizes to polymorphic and homologous loci on human X and Y chromosomes.
abstract: Use of a 4.5-kilobase-pair (kb) segment of single-copy DNA from a human genomic library as a hybridization probe of genomic human DNAs revealed allelic Taq I restriction fragments 10.6, 11.8, and 14.6 kb long. Among 12 unrelated individuals, all 6 males exhibited the 14.6-kb fragment in addition to one of the other fragments. Three of the females displayed 10.6- and 11.8-kb fragments, and the other three displayed only one fragment length; none had the 14.6-kb fragment. Hybridization of this probe to Taq I-digested DNAs from human-rodent hybrid cell lines (which have partial complements of human chromosomes) demonstrated segregation of the 14.6-kb fragment with the human Y chromosome and segregation of the 10.6- and 11.8-kb fragments with the human X chromosome. Furthermore, hybridization of this probe to Taq I-digested DNAs from 48 members of a single kindred revealed Y-linked inheritance of the 14.6-kb fragment and X-linked inheritance of the 10.6- and 11.8-kb fragments. These experiments demonstrate homology between single-copy sequences on the human X and Y chromosomes.
mesh_terms: D000483:Alleles; D000818:Animals; D010582:Bacteriophage lambda / Q000235:genetics; D001483:Base Sequence; D006224:Cricetinae; D003412:Cricetulus; D004262:DNA Restriction Enzymes; D005260:Female; D006801:Humans; D006822:Hybrid Cells; D008297:Male; D009693:Nucleic Acid Hybridization; D010375:Pedigree; D011110:Polymorphism, Genetic; D012091:Repetitive Sequences, Nucleic Acid; D012730:Sex Chromosomes; D014960:X Chromosome; D014998:Y Chromosome
chemical_list: D004262:DNA Restriction Enzymes