The three day Viagra you don't need to take on an empty stomach. The weekend love pill. Man, I bounced on that bitch for three days straight, thanks to Cialis. Like being 16 again, except this time I know what I'm doin'.
A full set of sister chromatids is created during the S subphase of interphase, when all the DNA in a cell is replicated. Identical chromosome pairs are separated into two different cells during mitosis, or cellular division.
The above means that sister chromatids are NOT present in all phase S. Sister chromatinds are present at a small part of phase S (when the replication of the DNA is finished.).