It has been decades since Watson and Crick discovered the structure of DNA, and over a decade since the human genome was completely sequenced. In the ensuing years, technology to decode, understand, and change individual genes has grown in leaps and bounds. It is no longer a question of if we can change the very thing that makes us human, but should we. The question of should we rewrite the code of life is a complicated one, especially as it is not really one question but several, each stemming from a different type of possible modification. The most important difference is between somatic modification and germ line modification.
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