adult frog unfertilized egg 8> skin cells in culture dish >蛙体 nucleus destroyed by UV light 细胞核 nucleus in pipette 移植后 发育成 nucleus injected 蝌蚪。 into egg normal blastula O tadpole 主讲：汤华 14主讲：汤 华 14 ¾蛙体 细胞核 移植后 发育成 蝌蚪