Karyotype of various type of 21-trisomy Standard type(47,XY/XX, +21) mosaicism(46/47+21) Translocation (eg: 46, -13, +t(13q: 21q)• Standard type (47,XY/XX,+21) • masaicism（46 / 47 + 21） • Translocation（eg：46, -13,+t(13q;21q） Karyotype of various type of 21-trisomy