Question

An example of gene therapy is

• A. Production of injectable hepatitis B vaccine
  
• B. Production of vaccines in food crops like potatoes which can be eaten
  
• C. Introduction of the gene for adenosine deaminase in persons suffering from Severe Combined Immuno Deficiency (SCID)
  
• D. Production of test tube babies by artificial insemination and implantation of fertilised eggs.

Answer 1

The correct option is C

Introduction of the gene for adenosine deaminase in persons suffering from Severe Combined Immuno Deficiency (SCID)

Gene therapy is the method of correction of the genetic defect by replacing the normal gene with the faulty gene. The first clinical gene therapy was given to a 4-year old girl with adenosine deaminase (ADA) deficiency. Deficiency of ADA causes SCID.