title: Abnormalities of human sex chromosomes. VI. Monozygotic twins with the complement 48,XXXY.
mesh_terms: D000328:Adult; D001345:Autoradiography; D001706:Biopsy; D004261:DNA Replication; D004200:Diseases in Twins; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000235:genetics*; D007621:Karyotyping; D007713:Klinefelter Syndrome / Q000235:genetics* / Q000378:metabolism; D008297:Male; D008423:Maternal Age; D010641:Phenotype; D012730:Sex Chromosomes; D013737:Testis / Q000473:pathology; D014314:Trisomy