Question

which is an example of gene therapy? generating an attenuated virus to use in a live vaccine inserting a new gene into a plant that confers drought resistance replacing a disease - causing gene with a normal gene altering the dna of a rat embryo to generate a model for a disease inserting a new gene into bacteria so that it produces therapeutic proteins

Explanation:

Gene therapy aims to treat or prevent diseases by altering genetic material. Replacing a disease - causing gene with a normal gene directly addresses the genetic root of a disease, which is a key concept in gene therapy. The other options involve genetic manipulation for vaccine generation, plant trait improvement, disease - model generation in embryos, or protein production in bacteria, but not direct disease treatment at the genetic level like gene therapy.

Answer:

replacing a disease - causing gene with a normal gene