Endocycling cells successively replicate their genomes without segregating chromosomes during mitosis and thereby become polyploid. Lack of chromosome segregation typically results from downregulation of mitotic cyclin-dependent kinase activity. Endocycles probably evolved many times, and the various endocycle mechanisms found in nature highlight the versatility of the cell cycle control machinery.
- Bruce A. Edgar
- Norman Zielke
- Crisanto Gutierrez
