Answers to Review Questions

1) E. anaphase II of meiosis

Diagram A has 10 chromosomes. However, before they split, there were 5 in the cell (haploid). The cell is therefore in the second division of meiosis. During meiosis II, the chromosomes align during metaphase II. After they split and they begin separating, the cell is in anaphase II.

2) E. metaphase II of meiosis

The cell has 4 chromosomes and is therefore haploid. Haploid cells result after the first meiotic division. The chromosomes align during metaphase II.

3) B. metaphase of mitosis

The cell is diploid, so it can be mitosis or meiosis I. The chromosomes are aligned in the center of the cell during metaphase. However, during meiosis I, homologous chromosomes are paired. The chromosomes in the diagram are not paired, so it must be metaphase of mitosis.

4) F. None of the above

The cell is neither diploid (2N = 6) nor haploid (N = 3). Two chromosomes are missing from the diploid number. This does not occur during normal mitosis or meiosis.

5) A. prophase of mitosis

During prophase, the chromosomes coil and become visible and the nuclear membrane breaks down as the cell prepares for division. The cell is diploid and homologous chromosomes are not paired. If homologous chromosomes were paired, it would be prophase I of meiosis.

6) D. metaphase of mitosis

Diagram D is a diploid cell (2N = 2). The chromosomes are aligned, so it is metaphase of mitosis. It cannot be metaphase I of meiosis because the chromosomes are not paired.