Multiple Choice
Which of the following best describes a key difference between meiosis and mitosis as discussed in Chapter 13: Meiosis and Sexual Life Cycles?
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12. Meiosis
Introduction to Meiosis
Multiple Choice
In which division of meiosis do homologous chromosome pairs line up at the metaphase plate and then separate to opposite poles?
A
Mitosis
B
Meiosis II
C
Cytokinesis
D
Meiosis I
Verified step by step guidance1
Understand the key difference between Meiosis I and Meiosis II: Meiosis I involves the separation of homologous chromosomes, while Meiosis II involves the separation of sister chromatids.
Recall that during metaphase of Meiosis I, homologous chromosome pairs (tetrads) align at the metaphase plate. This is a hallmark of Meiosis I and does not occur in Mitosis or Meiosis II.
In anaphase of Meiosis I, homologous chromosomes are pulled apart to opposite poles of the cell by the spindle fibers. This separation reduces the chromosome number by half, making it a reductional division.
Eliminate the incorrect options: Mitosis does not involve homologous chromosome pairing, Meiosis II separates sister chromatids, and cytokinesis is the division of the cytoplasm, not chromosomes.
Conclude that the correct division where homologous chromosome pairs line up at the metaphase plate and then separate to opposite poles is Meiosis I.
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