Two Robertsonian translocations in a boy with mental retardation.
D002648:Child; D002871:Chromosome Banding; D002901:Chromosomes, Human, 13-15; D002904:Chromosomes, Human, 21-22 and Y; D006801:Humans; D008607:Intellectual Disability / Q000235:genetics*; D007621:Karyotyping; D007962:Leukocytes / Q000648:ultrastructure; D008297:Male; D009030:Mosaicism; D014178:Translocation, Genetic