During which stage do chromosomes line up in the center of the cell?

During which stage do chromosomes line up in the center of the cell?

• A. Metaphase I
• B. Metaphase II
• C. Anaphase II
• D. Telophase II

Answer: (B)

Chromosome alignment at the metaphase plate during meiosis II. After meiosis I, the cell is haploid but still contains replicated chromosomes, each made of two sister chromatids. In metaphase II, these individual chromosomes line up along the center of the cell, with spindle fibers attached to kinetochores from opposite poles, preparing to pull the sister chromatids apart in the next stage. In contrast, metaphase I features paired homologous chromosomes (tetrads) lined up at the center, not single chromosomes; anaphase II is when the sister chromatids separate, and telophase II is when nuclei reform around the separated chromatids and cytokinesis occurs.

Chromosome alignment at the metaphase plate during meiosis II. After meiosis I, the cell is haploid but still contains replicated chromosomes, each made of two sister chromatids. In metaphase II, these individual chromosomes line up along the center of the cell, with spindle fibers attached to kinetochores from opposite poles, preparing to pull the sister chromatids apart in the next stage.

In contrast, metaphase I features paired homologous chromosomes (tetrads) lined up at the center, not single chromosomes; anaphase II is when the sister chromatids separate, and telophase II is when nuclei reform around the separated chromatids and cytokinesis occurs.