Prophase II (Meiosis) describes...

• A. Nuclear membrane dissolves, spindle fibres begin to form, chromosomes appear
• B. Nuclear envelope reforms
• C. DNA replication occurs
• D. Cytokinesis occurs

Answer: (A)

In prophase II, the cell is preparing to separate the sister chromatids in meiosis II. The key changes are that the chromosomes condense and become visible, the nuclear envelope breaks down, and the spindle apparatus begins to form so spindle fibers can interact with the chromosomes. This combination sets up the next step where the chromosomes will be guided to opposite poles.

Why this fits best: breaking down the nuclear membrane, assembling spindle fibers, and having condensed chromosomes visible are the hallmark events that mark prophase II, enabling chromosome movement in the rest of meiosis II.

The other options don’t fit this stage: the nuclear envelope reforms later during telophase II when the chromosomes arrive at the poles and the nucleus re-forms; DNA replication occurs earlier, during the S phase before meiosis I, not in prophase II; cytokinesis happens after the chromosomes are separated, at the end of meiosis II, not during prophase II.