Teaching arrangement Lecture 1 (1)Introduction to DNA alterations and dna mutations (2) Replication errors and mismatch repair. Lecture 2: (1 Review replication errors and mismatch repairTeaching arrangement: Lecture 1: (1) Introduction to DNA alterations and DNA mutations (2) Replication errors and mismatch repair. Lecture 2: (1) Review replication errors and mismatch repair;