S (S phase) phase: cell growth, S stands for synthesis, that is, increase the number of chromosome DNA is synthetic, which occurs only in S. This phase takes about 10-12 hours.
Long S (S phase): more cell growth, S stands for synthesis, that is to increase the number of chromosomes. A DNA synthesis Which takes place in S phase only takes about 10-12 hours.
The S (S phase): cells grow more, S stands synthesis that is to increase the chromosome with the synthetic DNA, which is a term. S only recently spent about 10-12 hours.