Cells beyond the Hayflick limit are generally either in the G0
Cells beyond the Hayflick limit are generally either in the G0 [gee-zero] version of this or tagged for programmed cell death. Containing two checkpoints, this in animal cells generally lasts at least 12 hours and may entail the existence of centrioles, but in a random orientation. This period is comprised of G1 [gee-one], G2 [gee-two], and S sub-phases, during the latter of which DNA replication takes place. FTP, name  this longest segment of the cell cycle, the phase in between one mitosis and another.
Cells beyond the Hayflick limit are generally either in the G0
interphase