Class 12th Biology 2011 Set1 Delhi Board Paper Solution

Person born with hereditary disease can be cured with gene therapy. It involves various stage or gene corrections among child or when child is in embryo. Here the infected or error causing gene is replaced by a corrected gene.

 

First gene therapy was performed in the year 1990, on a girl (4 year) with deficient adenosine deaminase (ADA). The enzyme is crucial for developing immunity to human being.