Assertion : Molecular probes are available for diagnosing genetic disorders, e.g., Duchenne muscular dystrophy, cystic fibrosis, Tay-sach’s disease.
Reason : The molecular probes are usually double stranded pieces of DNAs, labelled with radioisotopes such as 32P.
Answer:- (c) Assertion is true but reason is false.
(c) : DNA probes are stretches of single-stranded DNA used to detect presence of complementary nucleic acid sequence (target sequences) by hybridisation. They are usually labelled with radioisotopes, to enable their detection.
