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![]() Sunday, December 21, 1997 Published at 14:54 GMT ![]() ![]() ![]() Sci/Tech ![]() First there was Dolly... ![]() Dolly, the first cloned sheep, now has two companions
The lambs, named Molly and Polly, have been cloned with a human gene so that their milk will contain a blood-clotting protein that can be extracted for use in treating human hemophilia.
The journal has named it the 'Breakthrough of the Year.'
The added human genes make therapeutic products in the sheep's milk so it can be extracted, purified and used to treat patients.
Farmers can benefit from the same technique used to make identical copies of animals that produce exceptional quantities of milk or meat.
But there are doubts over the use of the same technology in humans. In theory it could be used to genetically duplicate any human.
The same research could be used to add extra genes to human embryos, delete unwanted genes or to allow infertile women to give birth to genetic copies of themselves.
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