Identify the method that allows the correction of a gene defect.
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Gene therapy
Gene therapy is a collection of methods for correcting a gene defect that has been diagnosed in a child or an embryo. A normal gene is delivered into the person’s cells and tissues to take over the work of the faulty gene. The first case was a child with ADA deficiency.
(1) Gene therapy — Correct. It corrects the gene defect by supplying a normal gene.
(2) Replication — Incorrect. This is the copying of DNA before cell division. It makes more copies of the same DNA, defect included.
(3) Polymerase chain reaction — Incorrect. PCR makes many copies of a chosen DNA segment in the test tube. It is also used to detect genes of pathogens or mutations. It does not correct a defect.
(4) Enzyme linked immuno-sorbent assay — Incorrect. ELISA works on the antigen-antibody reaction. It is a test to detect an infection. It does not correct a gene defect.
NCERT Extract:
Gene Therapy –
