One of these events does not take place during meiosis

The correct option is "One successive division without any DNA replication".

To understand why this event does not take place during meiosis, let us break down the process of meiosis and examine each option step-by-step:

1. Understanding Meiosis:
Meiosis is a specialized form of cell division that reduces the chromosome number by half, creating four haploid daughter cells from a single diploid cell. To achieve this reduction, meiosis consists of one round of DNA replication followed by two successive cell divisions (known as Meiosis I and Meiosis II).
Therefore, meiosis involves two successive divisions, not just one division. In contrast, it is the DNA replication that occurs only once (during the S phase of interphase before Meiosis I begins).

2. Analyzing the Options:
• Chiasmata formation and crossing over: This occurs during Prophase I of Meiosis I. Homologous chromosomes pair up (synapsis) and exchange genetic material. The points of contact where crossing over occurs are called chiasmata. This is a hallmark event of meiosis.
• Segregation of homologous chromosomes: During Anaphase I of Meiosis I, homologous chromosome pairs separate and move toward opposite poles of the cell. This is essential for reducing the chromosome number.
• Separation of sister chromatids: During Anaphase II of Meiosis II, the sister chromatids of each chromosome are finally pulled apart to opposite poles, similar to what happens during mitosis.
• One successive division without any DNA replication: Since meiosis requires two successive divisions (Meiosis I and Meiosis II) following a single DNA replication event to produce haploid cells, the statement describing only "one successive division" is incorrect and does not take place during meiosis.