另一位通讯作者、昆明理工大学的生物学教授牛昱宇则告诉果壳：“我们的整个实验是在体外进行的，没有进入体内。体外培养就像培养细胞一样，不会产生个体。对我们的工作来说，这是一个重要的伦理界限。”
但未来呢？如果要利用嵌合体制造发育成熟的、可移植的器官，很可能还是躲不开嵌合体胚胎的继续发育
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