During which phases of mitosis are chromosomes composed of two sister chromatids?

Question

Quizplus · Accepted Answer

During prophase and metaphase, chromosomes condense and become visible, and each chromosome is composed of two identical sister chromatids held together by a centromere. In anaphase, the sister chromatids separate and are pulled to opposite ends of the cell. In telophase, the chromatids have fully separated and are now considered individual chromosomes. Therefore, choice B is the best answer as it correctly identifies the two phases during which chromosomes are composed of two sister chromatids.

During Which Phases of Mitosis Are Chromosomes Composed of Two