Partial trisomy 21.
D000328:Adult; D002648:Child; D002869:Chromosome Aberrations / Q000235:genetics*; D025063:Chromosome Disorders; D002904:Chromosomes, Human, 21-22 and Y; D003434:Crossing Over, Genetic; D004314:Down Syndrome / Q000235:genetics*; D005260:Female; D005347:Fibroblasts / Q000166:cytology; D006801:Humans; D007223:Infant; D008607:Intellectual Disability; D007621:Karyotyping; D008214:Lymphocytes / Q000166:cytology; D008297:Male; D008875:Middle Aged; D009030:Mosaicism; D010641:Phenotype; D013194:Staining and Labeling