AP BIOLOGY

Detailed explanation-1: -Anaphase. After metaphase is complete, the cell enters anaphase. During anaphase, the microtubules attached to the kinetochores contract, which pulls the sister chromatids apart and toward opposite poles of the cell (Figure 3c).

Detailed explanation-2: -Directly after anaphase is telophase. During telophase the spindle fibers that were moving the chromatids disappear, and new nuclear envelopes form around each set of chromatids, leaving two complete and separate nucleii, one at each pole of the cell. This marks the end of mitosis, which is when the nucleus is divided.

Detailed explanation-3: -Prophase – The chromosomes shorten and thicken. Metaphase – Chromosomes line up in the middle of the cell. Anaphase – Chromatids break apart at the centromere and move to opposite poles. Telophase – Two nuclei formed after nuclear envelopes reform around each group of chromosomes.