Final answer:
The knockout mice used for 1) biomedical research to study gene function and test potential therapies. 2) They help scientists understand the role of genes in diseases and identify new drug targets.
Step-by-step explanation:
They are mainly used in biomedical research to study the function of the gene that has been turned off. Knockout mice can help scientists understand the role of genes in various diseases, test potential therapies, and identify new drug targets.
One of the main uses of knockout mice is to study gene function. By removing a specific gene from the mouse genome, researchers can observe the effects on the mouse's phenotype and behavior.
Another use of knockout mice is in drug development. Researchers can create knockout mice that mimic human diseases and use them to test potential therapies. This allows scientists to better understand the disease and develop targeted treatments. So therefore the correct answer is 1) biomedical research to study gene function and test potential therapies. 2) They help scientists understand the role of genes in diseases and identify new drug targets.