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.
During the S phase the cell replicates the chromosomes by taking one chromatid and effectively doubling it (these are later ripped apart during Anaphase in Mitosis). So during the S phase of the Interphase cycle, chromosomes are replicated into two sister chromatids. Normally after this phase there is a check off to make sure nothing went wrong with the replication however should there be any mutations that will create some new DNA form this is where it would be made.