I hadn’t heard about the controversy over the three-parent embryo until my wife brought it to my attention: The U.K. may soon approve a regulatory proposal that would allow scientists to create a human embryo using the DNA of three individuals. The idea is to remove damaged maternal DNA and replace it with genetic material from another woman, in order to reduce the risk of transmitting a mitochondrial disorder.
This all sounds on the surface very clean and high-tech and altruistic. Yet it turns out that lots of people oppose it, including members of the Parliamentary Assembly of the Council of Europe and members of the European Parliament involved in its Bioethics Intergroup. What’s striking is how the opponents span the political spectrum. The open letter from the Bioethics Intergroup, for example, was signed by representatives of both the Conservative and Green parties….
The fear, in other words, is that the DNA modifications will take root not only in the child born of the adjusted embryo, but in all of that child’s descendants….