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Which event occurs in meiosis but not in mitosis?
A
Crossing over
B
Spindle formation
C
Cytokinesis
D
Chromosome replication
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1
Understand the basic difference between mitosis and meiosis: Mitosis results in two identical daughter cells, while meiosis results in four genetically diverse gametes.
Identify the unique events in meiosis: Meiosis includes two rounds of division (meiosis I and meiosis II) and introduces genetic diversity through processes not present in mitosis.
Focus on the event of 'crossing over': This occurs during prophase I of meiosis, where homologous chromosomes exchange genetic material, leading to genetic variation.
Compare with mitosis: In mitosis, homologous chromosomes do not pair up, and crossing over does not occur, as the goal is to produce identical cells.
Conclude that 'crossing over' is the event that occurs in meiosis but not in mitosis, as it contributes to genetic diversity in gametes.