申論題內容
1. Two teams of scientists reported yesterday that they had turned human skin cells into
what appear to be embryonic stem cells without having to make or destroy an embryo
— a feat that could quell the ethical debate troubling the field. All they had to do, the
scientists said, was add four genes. The genes reprogrammed the chromosomes of the
skin cells, making the cells into blank slates that should be able to turn into any of the
220 cell types of the human body, be it heart, brain, blood or bone.
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