Crossing over normally takes place during which of the following processes?

• A. Prophase I of meiosis
• B. Metaphase II of meiosis
• C. Anaphase I of meiosis
• D. Telophase II of meiosis

Answer: (A)

Verified step by step guidance

1. Understand that crossing over is a process where homologous chromosomes exchange genetic material, increasing genetic diversity.
2. Recall that meiosis is a type of cell division that reduces the chromosome number by half, resulting in four genetically diverse haploid cells.
3. Identify the stages of meiosis: Prophase I, Metaphase I, Anaphase I, Telophase I, Prophase II, Metaphase II, Anaphase II, and Telophase II.
4. Recognize that crossing over occurs during Prophase I of meiosis, when homologous chromosomes pair up and exchange segments.
5. Conclude that the correct answer is Prophase I of meiosis, as this is the stage where crossing over takes place.