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QuestionBiology

During which phase of meiosis does crossing over of chromosomes occur?
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Answer

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Step 1:
: Understand the process of meiosis

Meiosis is a type of cell division that results in the formation of four gametes, or sex cells, each with half the number of chromosomes as the parent cell. This process includes two divisions, called Meiosis I and Meiosis II.

Step 2:
: Recognize the stages of meiosis

Meiosis can be broken down into several stages: prophase, metaphase, anaphase, and telophase. These stages occur in both Meiosis I and Meiosis II, with some differences between the two divisions.

Step 3:
: Identify when crossing over occurs

Crossing over is the exchange of genetic material between two homologous chromosomes. This process occurs during prophase I of meiosis, before the chromosomes separate.

Final Answer

Crossing over of chromosomes occurs during prophase I of meiosis.