Which event or events occur during anaphase?

• A. Cohesins joining sister chromatids at the centromeres are cleaved during anaphase.
• B. The centrioles are at opposite poles during anaphase.
• C. A spindle made of microtubules is present during anaphase.
• D. Genetically identical chromosomes (previously sister chromatids) move to opposite poles during anaphase.
• E. All of the listed responses are correct.

Answer: (E)

Verified step by step guidance

1. Understand that anaphase is a stage in mitosis where sister chromatids are separated and pulled towards opposite poles of the cell.
2. Recognize that cohesins, which are proteins that hold sister chromatids together at the centromere, are cleaved during anaphase to allow the chromatids to separate.
3. Identify that during anaphase, the centrioles, which are part of the cell's cytoskeleton, are positioned at opposite poles of the cell to facilitate the separation of chromatids.
4. Acknowledge that a spindle apparatus made of microtubules is present during anaphase, which helps in pulling the chromatids apart.
5. Conclude that as a result of these processes, genetically identical chromosomes, which were previously sister chromatids, move to opposite poles of the cell, ensuring each new cell will have the same genetic material.