Eucaryotic Cell Cycle Daughter G cells Chromosome condensation Nuclear envelope breakdown Chromosome Chromosome segregation decondensation Reformation of G Chromatids nuclear envelope Cytokinesis G ONA synthesis A typical mammalian cell has a cell cycle time of 24 hours,with 12 hr G.,6-8 hr S,3-4 hr G2,and 1 hr M Eucaryotic Cell Cycle A typical mammalian cell has a cell cycle time of 24 hours, with 12 hr G 1, 6-8 hr S, 3-4 hr G 2, and 1 hr M