Question

adenosine deaminase (ada) deficiency is a genetic disorder that prevents dna replication in the stem cells that produce t cells and b cells. some people with ada deficiency have dna from their t cells removed. this dna is modified with a functioning ada gene and then inserted into a virus. the virus is then delivered back into the person with ada deficiency, who is then able to produce normal levels of t cells and b cells. the treatment described above is an example of transformation dna fingerprinting gene therapy genetic screening

Explanation:

Gene therapy involves altering genes within cells to treat or prevent diseases. Here, a non - functioning ADA gene in patient cells is replaced with a functioning one using a virus, which is characteristic of gene therapy. Transformation is a general process of cell - uptake of foreign DNA not in this therapeutic context. DNA fingerprinting is for identification, not treatment. Genetic screening is for detecting genetic disorders, not treating them.

Answer:

C. gene therapy