cell cycle phase G1 phase GO:0051318 Note that this term should not be used for direct annotation. If you are trying to make an annotation to x phase, it is likely that the correct annotation is 'regulation of x/y phase transition' or to a process which occurs during the reported phase (i.e mitotic DNA replication for mitotic S-phase). To capture the phase when a specific location or process is observed, the phase term can be used in an annotation extension (PMID:24885854) applied to a cellular component term (with the relation exists_during) or a biological process term (with the relation happens_during). The cell cycle 'gap' phase which is the interval between the completion of DNA segregation (usually by mitosis or meiosis) and the beginning of DNA synthesis. Wikipedia:G1_phase biological_process