What occurs during anaphase of mitosis?

• A. Chromosomes align at the cell's equatorial plane.
• B. Sister chromatids are pulled apart to opposite poles of the cell.
• C. The nuclear envelope re-forms around each set of chromosomes.
• D. The cell grows and duplicates its DNA.

Answer: (B)

Verified step by step guidance

1. Understand that mitosis is a process of cell division that results in two genetically identical daughter cells from a single parent cell.
2. Recognize that mitosis consists of several phases: prophase, metaphase, anaphase, and telophase.
3. Identify that anaphase is the third phase of mitosis, following metaphase.
4. During anaphase, the sister chromatids, which are identical copies of a chromosome connected by a centromere, are pulled apart by the spindle fibers.
5. These sister chromatids are moved to opposite poles of the cell, ensuring that each new daughter cell will receive an identical set of chromosomes.