Twins, probably monozygotic: one mongoloid with 48 chromosomes, the other normal.
D001789:Blood Group Antigens; D002675:Child, Preschool; D002869:Chromosome Aberrations; D025063:Chromosome Disorders; D004247:DNA / Q000096:biosynthesis*; D003878:Dermatoglyphics; D004200:Diseases in Twins / Q000175:diagnosis*; D004314:Down Syndrome; D005260:Female; D006242:Haptoglobins; D006801:Humans; D007621:Karyotyping; D012728:Sex Chromatin
D001789:Blood Group Antigens; D006242:Haptoglobins; D004247:DNA