During which stage(s) do sister chromatids begin to move toward opposite poles? Choose the most complete answer.A. Anaphase of mitosisB. Anaphase I of meiosisC. Anaphase II of meiosisD. A and CE. B and C

The correct answer is D. A and C. Sister chromatids begin to move toward opposite poles during the Anaphase of Mitosis and Anaphase II of Meiosis.

In Anaphase of Mitosis, the sister chromatids separate and move towards opposite ends of the cell. This is a key part of cell division, ensuring that each new cell will have a complete set of chromosomes.

In Meiosis, the process is a bit more complex because it involves two rounds of cell division (Meiosis I and Meiosis II). During Anaphase I of Meiosis, homologous chromosomes separate and move towards opposite poles, but sister chromatids remain together. It's not until Anaphase II of Meiosis that sister chromatids separate and move towards opposite poles.

So, the stages where sister chromatids begin to move toward opposite poles are Anaphase of Mitosis and Anaphase II of Meiosis.