F ig.1 F ISH hybrid ization us ing chrom osom e21qter probe on m etaphase chrom osom eTw o red s igna ls represen ted the te lom ere of thelong arm on chrom osom e 21.

• 标题： 图1用21qter探针与正常人中期相外周血染色体进行荧光原位杂交两个红色信号为21号染色体长臂末端的端粒部位.