Later this year, legislators in the UK will vote on (and almost certainly pass) a bill to begin human testing on a new technique of so-called “three-parent” in-vitro fertilization. To understand why this might be helpful, and how a third parent can be medically useful, you need to understand the basics of genetic inheritance. The most important single insight is this: an egg is the factory of human life, while a sperm is just a nucleus with an outboard motor.
Note: Kind of like Dr Frankenstein attempting to perfect the human race, eh?
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