title: Chromosomal translocation between chromosomes 15 and 21 observed in two siblings with Down's syndrome and in their three relatives.
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D004314:Down Syndrome / Q000235:genetics*; D005260:Female; D006801:Humans; D007621:Karyotyping; D008297:Male; D008875:Middle Aged