Familial 21-21 translocation.
D000022:Abortion, Spontaneous; D000293:Adolescent; D000328:Adult; D002648:Child; D002869:Chromosome Aberrations; D002904:Chromosomes, Human, 21-22 and Y; D004314:Down Syndrome / Q000235:genetics*; D005260:Female; D006801:Humans; D007621:Karyotyping; D008297:Male; D008875:Middle Aged; D011247:Pregnancy; D014314:Trisomy