Anaphase I (Meiosis) describes...

• A. Sister chromatids separate
• B. Homologous chromosomes move toward opposite poles; each chromosome remains double stranded
• C. Nuclear envelope reforms
• D. DNA replication occurs

Answer: (B)

Anaphase I of meiosis is when homologous chromosomes separate and move toward opposite poles, while sister chromatids stay attached at the centromere. This means each chromosome remains double-stranded during this stage. The separation of homologs, not the separation of sister chromatids, is what reduces the chromosome number by half. DNA replication has already occurred earlier in S phase, so it isn’t happening during Anaphase I, and the nuclear envelope reforms later, after telophase. So the description that best fits Anaphase I is that homologous chromosomes move to opposite poles while each chromosome remains double-stranded.