Question

what happens during anaphase? the chromosomes line up in the middle of the cell. the sister chromatids separate and move to opposite sides of the cell. the cell grows, replicates its dna, and gets ready to divide. a nuclear membrane forms around each set of dna.

Explanation:

To determine what happens during anaphase, we analyze each option:

• "The chromosomes line up in the middle of the cell" describes metaphase, not anaphase.
• "The sister chromatids separate and move to opposite sides of the cell" is the correct event for anaphase, as the spindle fibers pull the sister chromatids apart to opposite poles.
• "The cell grows, replicates its DNA, and gets ready to divide" is part of interphase, not anaphase.
• "A nuclear membrane forms around each set of DNA" occurs during telophase, not anaphase.

Answer:

The sister chromatids separate and move to opposite sides of the cell.