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Re:UK to allow babies from three people by m_mueller on Tuesday February 03, 2015 @09:20PM (#8994959)
It seems to me that the 'three people' metaphor is a bit misguided. I'd look at it as an organ donor-ship to an embryo - just a special organ that gets copied into every cell.
Re:UK to allow babies from three people by geographomics on Tuesday February 03, 2015 @09:52PM (#8995060)
I think "three people" is okay as it correctly gets across how many contributors there are of genetic and other biological material.

Some other sources have been referring to "three-parent babies" though, which doesn't seem right, as the mitochondrial donor has no maternal role or rights to the baby.

Re:UK to allow babies from three people by tomp on Wednesday February 04, 2015 @04:38AM (#8996007)
It's not, really, it's the other way around. The "mother's" nucleus is transplanted into the donor's nucleus-less egg (which has all the mitochondria). The appropriate analogy would be transplanting one person's brain into another person's body.
Re:UK to allow babies from three people by wtallis on Tuesday February 03, 2015 @09:41PM (#8995021)
It isn't just copied into every cell, it's also heritable—just a very insignificant inheritance.