title: 21-22 translocation Down's syndromea family with unusual segregating patterns.
mesh_terms: D000293:Adolescent; D000328:Adult; D002869:Chromosome Aberrations; D002904:Chromosomes, Human, 21-22 and Y; D004314:Down Syndrome / Q000235:genetics*; D005260:Female; D006801:Humans; D007223:Infant; D007962:Leukocytes; D008297:Male; D010375:Pedigree; D014314:Trisomy