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英语沙龙:克隆人类也许更容易Cloning Humans May Have It Easier

时间:2010-10-12 11:39:10 来源:tingclass 编辑:keke 可可英语APP下载 | 可可官方微信:ikekenet

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克隆人类也许更容易

许多科学家都认为克隆一个完整的人---除了在伦理上令人怀疑外---还存有许多技术障碍。毕竟，对动物克隆的深入研究已经表明有上百个失败案例，包括许多因严重畸形而通常流产的动物。

现在有消息说克隆人可能比以前所认为的要容易。人类有一种基因突变可以防止一些与动物克隆相关的发育畸形。一种叫做IGF２R的基因，通常遗传到绵羊、奶牛和老鼠，但不在人类身上。人类克隆一直是继承非遗传性的IGF２R基因，所以不会造成混乱，他们的发育将是正常的。但是另外约49个遗传基因会怎样呢？没有人能够知道他们会造成什么样的麻烦。所以人类比老鼠、绵羊和奶牛少一个遗传基因这一事实意味着克隆人类可能稍容易一些，但并不一定更安全。

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