context: Genetic engineering is now a routine research tool with model organisms. For example, genes are easily added to bacteria and lineages of knockout mice with a specific gene's function disrupted are used to investigate that gene's function. Many organisms have been genetically modified for applications in agriculture, industrial biotechnology, and medicine.
question: నమూనా జీవులతో ఒక సాధారణ పరిశోధన సాధనంగా మారింది ఏమిటి?
answers: Genetic engineering