How does the alignment of chromosomes differ between metaphase I and metaphase II?

• A. In metaphase I, homologous chromosomes align at the equator; in metaphase II, sister chromatids align at the equator.
• B. In both metaphase I and II, sister chromatids align at the equator.
• C. In both metaphase I and II, homologous chromosomes align at the equator.
• D. In metaphase I, sister chromatids align at the equator; in metaphase II, homologous chromosomes align at the equator.

Answer: (A)