Retrovirus is used for gene therapy because -
They have sequences common to human genome
They integrate rapidly into human genome
Economically viable
Easy to perform in labs
Ans. is 'b' they integrate rapidly into human gene In gene therapy vector is an agent required to transfer gene to an appropriate cell.Vectors used in gene therapy are of two types:Retrovirus belong to the vectors which integrate completely in the host chromosome.Other viruses used as vectors in gene therapy. Lenti virus - fully integrated Adeno virus - as episomes
Genetics