Researchers have genetically modified chickens to lay eggs which contain drugs that fight cancer.Read more
Science correspondent, BBC News
The BBC's Fergus Walsh explains what gene editing is and how it works.
The genetically modified insects are part of a project which aims to tackle malaria in Africa.
Researchers are feeding farmed salmon a genetically modified plant to see if it boosts omega-3 levels.
Science editor, BBC News website
The European Court of Justice has ruled that altering living things using the relatively new technique of genome editing counts as genetic engineering.Read more
Pigs in Scotland have had their genes altered so they are now immune to a deadly respiratory disease.