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Multiple Choice
Which of the following occurs in meiosis but not in mitosis?
A
Crossing over of homologous chromosomes
B
Separation of sister chromatids
C
Formation of the mitotic spindle
D
Cytokinesis
Verified step by step guidance
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 like crossing over.
Focus on crossing over: During prophase I of meiosis, homologous chromosomes pair up and exchange segments in a process called crossing over, which does not occur in mitosis.
Compare with mitosis: In mitosis, homologous chromosomes do not pair up, and there is no crossing over. The main purpose is to produce identical cells for growth and repair.
Conclude by elimination: Since crossing over is unique to meiosis and not present in mitosis, it is the correct answer to the question.