Answer:
Metaphase II
Explanation:
Chromosomes align in the centre of the cell during both rounds of meiosis. Specifically, this occurs during metaphase I and metaphase II.
During metaphase I, the homologous chromosomes line up in pairs. This makes two lines of chromosomes in the centre (not a single cell)
During metaphase II, the chromosomes line up in the centre, in a single file, and are pulled apart by the spindles, separating the two sister chromatids.
