Question

what happens in anaphase?
a. sister chromatids separate and move toward opposite poles.
b. chromosomes line up single file down the middle of the cell.
c. nuclei re - form.
d. the nucleus disintegrates.

Explanation:

In anaphase of mitosis, sister chromatids separate at the centromere. Then, they are pulled by spindle fibers to opposite poles of the cell. Option B occurs in metaphase, option C in telophase, and option D in prophase.

Answer:

A. Sister chromatids separate and move toward opposite poles.