Keywords Mouse;morula blastomeres;ear fibroblast cells;nuclear transfer;electrofusion;sucrose;in vitro fertilization;parthenogenetical activation;pronuclear transplantation;

• 小鼠;桑椹胚卵裂球;耳成纤维细胞;核移植;电融合;蔗糖;体外受精;孤雌激活;原核置换;