Prophase II features the reappearance of which structures?

Prophase II features the reappearance of which structures?

• A. Crossing over occurs between homologues.
• B. Chromosomes condense and spindle apparatus forms.
• C. Homologous pairs align at the metaphase plate.
• D. The nucleus reforms completely.

Answer: (B)

In meiosis II, prophase II is when the cell gets ready for the second division by reorganizing its contents. The chromosomes condense again so they become visible, and the spindle apparatus forms to help separate the sister chromatids in the next stage. This combination—condensing chromosomes and reassembling the spindle—is exactly what characterizes this phase. Crossing over happens earlier, between homologous chromosomes in prophase I, so it isn’t part of prophase II. Alignment at the metaphase plate happens in metaphase II, and the nucleus re-forms later (at telophase II), not during prophase II.

In meiosis II, prophase II is when the cell gets ready for the second division by reorganizing its contents. The chromosomes condense again so they become visible, and the spindle apparatus forms to help separate the sister chromatids in the next stage. This combination—condensing chromosomes and reassembling the spindle—is exactly what characterizes this phase. Crossing over happens earlier, between homologous chromosomes in prophase I, so it isn’t part of prophase II. Alignment at the metaphase plate happens in metaphase II, and the nucleus re-forms later (at telophase II), not during prophase II.