Defective DNA replaced by a healthy version

  • If the new technique gets the go-ahead only a tiny amount of DNA in a cell will be changed
  • The part that determines individual characteristics such as facial features and eye colour, will remain intact
  • But the defective DNA will be replaced by a healthy version supplied by a female donor, making them the third genetic parent

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UK may allow 3 parent babies

Britain could become the first country in the world to allow babies to be born with three genetic parents to help stamp out serious diseases.