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The procedure has also been under scrutiny this week in the United States as an advisory committee to the Food and Drug Administration discussed the technique at a 2-day meeting.
Mitochondrial diseases occur when the organelles, which provide energy for cells, don’t work properly. Many such disorders result from mutations in the genes that mitochondria carry. Because mitochondria are passed on through the egg cell, the diseases are inherited from the mother.
Researchers have developed ways to transfer the genetic material from an egg cell that carries faulty mitochondria into a donor egg cell that...