Prophase II includes which event?

Prophase II includes which event?

• A. Nuclear membrane re-forms
• B. Spindle fibres begin to form; chromosomes appear
• C. DNA replication occurs
• D. Chromosomes condense

Answer: (B)

In prophase II, the cell is preparing to divide again in meiosis II. The key events are the formation of the spindle apparatus and the chromosomes becoming visible as they condense. This stage follows the first meiotic division, so there’s no DNA replication between divisions, and the nuclear envelope has already broken down earlier. Because prophase II centers on the spindle forming and chromosomes appearing, the statement that describes both of these happenings best captures what happens here. The other options describe events that occur at different times (nuclear membrane reforming happens later in telophase II; DNA replication happens before meiosis I; chromosomes condensing is true but doesn’t emphasize the spindle formation aspect as clearly).

In prophase II, the cell is preparing to divide again in meiosis II. The key events are the formation of the spindle apparatus and the chromosomes becoming visible as they condense. This stage follows the first meiotic division, so there’s no DNA replication between divisions, and the nuclear envelope has already broken down earlier. Because prophase II centers on the spindle forming and chromosomes appearing, the statement that describes both of these happenings best captures what happens here. The other options describe events that occur at different times (nuclear membrane reforming happens later in telophase II; DNA replication happens before meiosis I; chromosomes condensing is true but doesn’t emphasize the spindle formation aspect as clearly).