Looking through a light microscope at a cell undergoing division, you see that the condensed chromosomes have lined up along the midline of the cell. The homologous pairs are NOT joined in tetrads. Each chromosome takes its own place in line, independent of its homolog. You are witnessing .
1. interphase
2. metaphase of mitosis
3. metaphase of meiosis I
4. telophase of either mitosis or meiosis II

2. metaphase of mitosis

Explanation:

Chromosomes are aligned at the equator of the cell during metaphase. In metaphase of meiosis-I, the homologous pairs of chromosomes align themselves as tetrads on the equator. Each of these pairs has a total of four chromatids, two sister chromatids of each homologous chromosome.  

If the cell is in metaphase of mitosis, individual chromosomes align themselves at the equator. Each chromosome has two sister chromatids. Since the individual chromosomes are at the equator, the cell is in the metaphase of mitosis.