Familial translocation (3?--;G?- q+) and nondisjunction of chromosome in group G in two unrelated families.
D000328:Adult; D002648:Child; D002869:Chromosome Aberrations; D002900:Chromosomes, Human, 1-3; D002904:Chromosomes, Human, 21-22 and Y; D003582:Cytogenetics; D004314:Down Syndrome; D005260:Female; D006801:Humans; D007223:Infant; D007621:Karyotyping; D008297:Male; D010375:Pedigree