Bt toxin, produced by Bacillus thuringiensis has been cloned expressed in plants to provide resistance to insects without the need for insecticides in effect created a biopesticide.
$RNAi$ ($RNA$ interference): Involves silencing of a specific $mRNA$ due to formation of $dsRNA$ molecule which binds to complementary $mRNA$, thereby preventing translation.
Gene therapy: Collection of methods that allow correction of a gene defect that has been diagnosed in a child/ embryo.