What is the difference between meiosis I and meiosis II? Select one: a. Meiosis II results in four haploid cells, whereas meiosis I results in two diploid cells. b. Meiosis I includes a prophase stage, unlike meiosis II. c. Nuclear membranes form during meiosis II but not during meiosis I. d. Cytokinesis occurs during meiosis II but not during meiosis I.

The correct answer is: d. Cytokinesis occurs during meiosis II but not during meiosis I.

In meiosis, a cell undergoes two sequential divisions (meiosis I and meiosis II) to produce four haploid daughter cells from a diploid parent cell. The process of cytokinesis, which involves the division of the cell's cytoplasm, occurs differently between meiosis I and meiosis II:

• Meiosis I: This is the first division in meiosis. It involves homologous chromosomes pairing up and segregating into two daughter cells. At the end of meiosis I, two haploid daughter cells are formed, each containing half the number of chromosomes as the original diploid cell. Cytokinesis occurs after telophase I, dividing the cell into two distinct daughter cells.
• Meiosis II: Following meiosis I, the two daughter cells from the first division enter meiosis II. In meiosis II, each of the haploid daughter cells from meiosis I further divides to produce a total of four haploid cells. Meiosis II is similar to mitosis but involves half the number of chromosomes. During meiosis II, cytokinesis occurs again, resulting in the separation of the cells' cytoplasm to form the four haploid daughter cells.

Therefore, cytokinesis occurs during both meiosis I and meiosis II, but it happens at different stages: after meiosis I to create two cells and after meiosis II to form a total of four haploid daughter cells.