Which of the following does not occur during mitosis?

Step 1: Define the Problem

Identify which process or event does not take place during the mitosis phase of the cell cycle.

Step 2: Break Down the Problem

Mitosis involves several stages: prophase, metaphase, anaphase, and telophase. Key events include:

• Chromosome condensation
• Alignment of chromosomes at the metaphase plate
• Separation of sister chromatids
• Formation of two daughter nuclei

Step 3: Apply Relevant Concepts

Mitosis is specifically the division of a cell's nucleus and does not include processes related to the division of the cytoplasm or other cell cycle phases.

Step 4: Analysis, Verify and Summarize

• Cytokinesis: This is the process of cytoplasmic division, which occurs after mitosis.
• DNA Replication: Occurs during the S phase of interphase, not during mitosis.
• Crossing Over: Occurs during meiosis, not mitosis.
• Chromosome Condensation and Separation: These are integral parts of mitosis.

Final Answer

DNA replication does not occur during mitosis; it occurs during the S phase of interphase.