She was cloned from a single cell of an adult female sheep, overturning long-held scientific dogma that had declared such a thing biologically impossible.
They next extracted DNA from a dog oocyte (an immature female reproductive cell prior to fertilization) and injected the fluorescent-modified dog cells into it.
Using stem cell technology, reproductive scientists in Texas, led by Dr. Richard r. Berhringer at the M.D. Anderson Cancer Center, have produced male and female mice from two fathers.
使用干细胞技术，由richard r . Berhringer博士带领的德克萨斯州M.D.A nderson肿瘤中心的生殖科学家们利用两只公鼠成功繁殖出雌性和雄性老鼠后代。