The House of Commons in the U.K. has now voted to permit mitochondrial DNA replacement, which enables babies to be born who have DNA from three people.
Mitochondria are the batteries of our cells that provide energy for cell division and growth. We get ours from our mother’s genes. If there is a defect in a mother’s mitochondria, it can have devastating consequences for her children, resulting in almost certain death. But, by extracting a mitochondrion from a healthy donor egg, scientists are now able to conduct a miniature organ transplant on the cellular level to create a healthy baby through in vitro fertilization. Such a baby has its parents’ genes, except for one small but crucial portion obtained from a donor.
If the House of Lords also approves, Britain will be the first nation to authorize the procedure. The United States is studying mitochondrial transplants. A series of meetings began last week at the Institute of Medicine at the request by the Food and Drug Administration.
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