What occurs during telophase I in cell division?

During telophase I in cell division, specifically in the context of meiosis, the correct answer is that a nuclear membrane forms around each set of chromosomes. Telophase I is characterized by the reformation of the nuclear envelope after the chromosomes have been separated and are at opposite poles of the cell. This marks the conclusion of the first meiotic division.

During this phase, the chromosomes, which were previously condensed and aligned at the metaphase plate, begin to de-condense, and the nuclear membrane reassembles around each haploid set of chromosomes. This process is crucial because it establishes the distinct nuclear compartments for the daughter cells.

Understanding the role of the nuclear membrane formation in telophase I helps clarify its significance in preparing the cell for the second meiotic division, where the genetic content will be further divided. The other options generally describe events that occur in varying phases of mitosis or meiosis but are not part of telophase I specifically.