Transition mutation of GATCCT is: (PGI Dec 2006): (A) GGTCCT, (B) GTTCCT, (C) GTCCCT, (D) GGUGGT
Answer is A. Ans: A (GGTCCT) In Transition type of mutation, a purine base is replaced by another purine base (A-G) or a pyrimidine is replaced by another pyrimidine (C-T).So-Transition of -GATCCT is GGTCCT (only single base is changed, according to options given, it the only answer)