What treatment involves the transfer of a normal gene into cells of an individual with the intent to correct a genetic defect or treat a disease?

A) DNA cloning
B) DNA sequencing
C) gene replacement
D) gene therapy
E) reverse transcriptase

The treatment that involves the transfer of a normal gene into cells of an individual with the intent to correct a genetic defect or treat a disease is called gene therapy. This can be done using a variety of methods, including viral vectors or direct insertion of the gene into the genome. DNA cloning, sequencing, gene replacement, and reverse transcriptase are not the treatments that involve transferring normal genes into cells to correct genetic defects.