WBUR's Christopher Lydon did a great series of interviews on this this week, here's the podcast link: https://itunes.ap...73330619

You simply can't deny a patient this treatment, but the germline implications should be considered very carefully, diversity in the human genome can only be a good thing, our understanding of genetic evolution is limited by our own existence and limited by our sciences narrow window of actual observational data. Who's to say that cancer gene may not become the building block of the next human evolutionary leap ?

Embryos' natural preference for a parent's gene "is very strong, and they won't use anything else. Extending human genome seems to be impossible. And gene sequences (DNA) don't determine traits.