Final answer:
During the metaphase of mitosis, the centriole pairs are nearly migrated to opposite poles, setting the stage for the next phase, anaphase. In anaphase, sister chromatids are pulled apart to opposite poles, resulting in two daughter cells with identical genetic material.
Step-by-step explanation:
The stage of mitosis during which the centriole pairs are almost fully migrated to opposite poles is known as metaphase. During this stage, the sister chromatids, with their attached microtubules, are lined up along the metaphase plate in the middle of the cell. The centrosomes, where the centriole pairs are located, are at opposite ends of the cell, ready for the next stage, anaphase, where the sister chromatids will be separated and pulled to opposite poles.
In anaphase, which is considered the third stage of mitosis, the pairs of sister chromatids are indeed separated from each other and pulled towards the opposite poles of the cell by their kinetochores as the microtubules shorten. Each end of the cell receives one partner from each pair of sister chromatids, ensuring that the two new daughter cells will contain identical genetic material.