Question

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

Explanation:

• In Anaphase II of meiosis, the sister chromatids separate. This is similar to what happens in mitotic anaphase. The separation is due to the breakdown of the cohesin proteins that hold them together. Once separated, the sister chromatids (now individual chromosomes) move toward opposite poles of the cell.
• Option B describes metaphase (in mitosis or metaphase II in meiosis), where chromosomes line up at the equatorial plane.
• Option C describes telophase, where nuclei re - form.
• Option D describes anaphase I of meiosis, where homologous chromosomes (tetrads separate as homologous chromosomes move to opposite poles, not sister chromatids).

Answer:

A. Sister chromatids separate and move toward opposite poles