title: XYY chromosomal complement, proven by fluorescence, in a child with trisomy 21:48,XYY,21+.
mesh_terms: D001345:Autoradiography; D002455:Cell Division; D002478:Cells, Cultured; D002675:Child, Preschool; D002904:Chromosomes, Human, 21-22 and Y; D004261:DNA Replication; D003878:Dermatoglyphics; D004314:Down Syndrome / Q000175:diagnosis* / Q000235:genetics; D005453:Fluorescence; D006801:Humans; D007621:Karyotyping; D008297:Male; D008856:Microscopy, Fluorescence; D012729:Sex Chromosome Aberrations / Q000175:diagnosis*; D012730:Sex Chromosomes / Q000032:analysis; D014314:Trisomy