When the modified offspring of these mice were examined, she and her colleagues found that the transgene was being expressed in widely varying ways.

ECONOMIST: Genes are not all there is to heredity

The transgene began to be expressed again in the resulting litters.

ECONOMIST: Genes are not all there is to heredity

Doctor Phillips said that the team of scientists utilised a transgene that confers on the pig the ability to digest phosphorus in a way normal pigs could not.

BBC: GM pigs to produce cleaner manure