A gene that normally has the sequence CAGAGCCTATTAGGC is replicated as CAGAGCTGACGAGGC. Which of the repair mechanisms would most likely be employed to fix this replication error?

DNA Mismatch repair.  

Explanation:

DNA Mismatch repair is a form of excision repair that corrects mismatched base pairs resulting from replication errors and heteroduplexes produced during genetic recombination. this repair is engineered to recognize and repair erroneous insertion, deletion, and mis-incorporation of bases that can arise as well as repairing various types of DNA damage. Mismatch repair is also strand-specific in that it majorly works on the newly sythesized strand by identifying the strand first and then correcting any form of errors.