Scientists engineer MUTANT animals as ‘surrogate sires’ to revolutionise farming

Current regulations, however, mean these GM surrogate sires could not be used in the food chain, even though their offspring would not be gene-edited.

The scientists harnessed CRISPR-Cas9 to encourage a gene-specific to male fertility in the animal embryos eventually raised to become the surrogate sires.

Although the male beasts were born sterile, they started to produce sperm after being injected stem cells from donor animals into their sexual organs.

Dr Bruce Whitelaw, of the UK’s Roslin Institute also involved in the study, said: ”This shows the world that this technology is real.

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