What is the outcome regarding chromosome structure during Telophase I and cytokinesis?

Study for the SACE Stage 2 Biology Exam. Enhance your understanding with quizzes, interactive flashcards, and detailed explanations. Be fully prepared for your exam success!

During Telophase I and cytokinesis of meiosis, the key event is that the cells transition from a diploid state to a haploid state. In this phase, the homologous chromosomes, which have already been separated during Anaphase I, finish their migration to opposite poles of the cell. At this point, each chromosome still comprises two sister chromatids held together at the centromere, which is crucial for the subsequent stages of meiosis.

The chromosomes do not undergo replication during this phase; rather, they are already duplicated from the preceding S phase. Therefore, the result of Telophase I is the formation of two haploid daughter cells, each containing chromosomes that consist of two sister chromatids. This arrangement is critical as it prepares the cells for the second meiotic division, ensuring genetic variation through the eventual separation of the sister chromatids. Thus, the correct choice reflects this understanding of haploidy and chromosome structure at this stage of meiosis.

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