the variability of ( 1 ) surface area projection ( size ) at which cells terminate dna replication , ( 2 ) the area at which they initiate mitosis , ( 3 ) the area at which they divide , ( 4 ) the duration of g2 , and ( 5 ) the duration of g2 plus mitosis ( in fact , prophase + metaphase + anaphase ) has been estimated in steady-state cell populations of allium cepa root meristems .
C0025564
metaphase
C0007634
cell