The trisomy 21 and the trisomy 17-18 syndromes in siblings.
D001789:Blood Group Antigens; D002869:Chromosome Aberrations / Q000235:genetics*; D025063:Chromosome Disorders; D002902:Chromosomes, Human, 16-18; D002904:Chromosomes, Human, 21-22 and Y; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007621:Karyotyping; D008297:Male; D010375:Pedigree; D013577:Syndrome; D014314:Trisomy
D001789:Blood Group Antigens