The book "DNA Mismatch Repair and Checkpoint System during Meiosis" by Lin Sun offers a comprehensive study of DNA mismatch repair (MMR) and checkpoint systems during meiosis, using T. thermophila as a model organism. T. thermophila is characterized by its large single cell, which facilitates the analysis of chromosomal changes. The inducible conjugation of this organism allows for targeted exploration of protein functions during meiosis. The book highlights the role of MMR in enhancing DNA replication accuracy and the importance of checkpoint systems in maintaining genomic integrity during the cell cycle. In particular, it examines the relationship between meiotic checkpoint systems and DNA MMR, contributing to a better understanding of meiotic processes in eukaryotes.