During which phase of meiosis does independent assortment occur?

• A. Anaphase I
• B. Metaphase I
• C. Prophase I
• D. Telophase I

Answer: (B)

Verified step by step guidance

1. Understand the concept of independent assortment: Independent assortment refers to the random distribution of maternal and paternal chromosomes into gametes during meiosis. This process contributes to genetic variation.
2. Review the stages of meiosis: Meiosis consists of two main stages, Meiosis I and Meiosis II, each with several phases: Prophase, Metaphase, Anaphase, and Telophase.
3. Focus on Metaphase I: During Metaphase I, homologous chromosomes (pairs of maternal and paternal chromosomes) line up at the metaphase plate. This is the stage where independent assortment occurs, as the orientation of each pair is random.
4. Consider the role of Anaphase I: In Anaphase I, homologous chromosomes are pulled apart to opposite poles of the cell. While this is crucial for separation, independent assortment has already occurred in the previous phase.
5. Clarify why Metaphase I is correct: The random alignment of homologous chromosome pairs during Metaphase I is what leads to independent assortment, making this phase the correct answer for when independent assortment occurs.