Ace Biology 30 Mitosis & Meiosis 2026 – Dive into Cell Division Success!

Segregation in meiosis refers to the separation of homologous chromosome pairs into different daughter cells during the first meiotic division. Each chromosome already duplicates into two sister chromatids, which stay together during this first division, while the homologous chromosome from the other chromosome partner moves to the opposite pole. This separation of homologues reduces the chromosome number by half, producing haploid cells that still contain duplicated chromosomes until meiosis II finishes the process. Crossing over can occur during prophase I and adds genetic variation, but it is a separate event from segregation. DNA replication happens earlier in the cycle (before meiosis) and is not what segregation describes. The statement describing homologous pairs separating and moving to opposite sides best captures the concept.