During which phase(s) of mitosis are chromosomes composed of two sister chromatids?
A) prophase and prometaphase only
B) prophase, prometaphase, and metaphase
C) prophase, prometaphase, metaphase, and anaphase
D) anaphase and telophase only
E) all phases of mitosis

Question

Quizplus · Accepted Answer

During prophase, prometaphase, and metaphase of mitosis, chromosomes are composed of two sister chromatids. These chromatids are joined together at the centromere. It is not until anaphase that the sister chromatids are pulled apart to opposite poles of the cell, which means they are no longer in the configuration of two sister chromatids per chromosome.

During Which Phase(s) of Mitosis Are Chromosomes Composed of Two