Fig. 2From: Monozygotic twins discordant for homologous Robertsonian translocation trisomy 21 of 46, XX, + 21, der (21;21) (q10; q10) in a twin-to-twin transfusion syndrome, case reportThe additional chromosome 21 was the paternal origin, and uniparental isodisomy is excluded in twin A with normal karyotypingBack to article page