Cell cycle checkpoints Chromosome and · Have the Is cell of sufficient size? centrosome duplication chromosomes been Have proper signals from environment been received completely duplicated? THEN: Decision to duplicate THEN: Decision to chromosomes and enter mitosis centrosomes Prophase Interphase Mitosis Ongoing protein synthesis and e Metaphase cell growth N Have all chromosomes Telophase arrived and aligned at and the metaphase plate? cytokinesis Anaphase THEN: Decision to initiate anaphase