In the anaphase stage, the sister chromatids separate and move toward the opposite cell poles.

Comparison of Duplicated Chromosomes & Sister Chromatids
Comparison of Duplicated Chromosomes & Sister Chromatids. By Tami Port, ScienceProfOnline, "When is DNA considered a chromosome? What is a sister chromatid and how does it differ from a chromos
Concept 7: Anaphase
Concept 7: Anaphase, Prentice Hall BioCoach Activity, Click the image to see an anaphase animation.
Mitosis: Metaphase and Anaphase
Mitosis: Metaphase and Anaphase, SparkNotes.com, Combination of text and illustrations.
Stages of Mitosis - Anaphase
Stages of Mitosis - Anaphase, By Regina Bailey, ThoughtCo., Combination of text and images; scroll down for links to other sections and an interactive test.