Multiple Choice
During which phase of Meiosis II are sister chromatids separated and move toward opposite poles of the cell?
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12. Meiosis
Meiosis II
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In meiosis II, which of the following events occurs?
A
Homologous chromosomes pair and exchange genetic material.
B
Sister chromatids are separated into different daughter cells.
C
DNA replication takes place before the division.
D
The cell divides to produce four genetically identical cells.
Verified step by step guidance1
Understand the context of meiosis II: Meiosis is a type of cell division that reduces the chromosome number by half, creating four haploid cells. Meiosis II is the second division phase, following meiosis I.
Recall the key events of meiosis II: Unlike meiosis I, meiosis II does not involve homologous chromosome pairing or crossing over. Instead, it focuses on separating sister chromatids.
Clarify the role of sister chromatids: Sister chromatids are identical copies of a chromosome that were created during DNA replication in the preceding interphase. In meiosis II, these chromatids are pulled apart into separate daughter cells.
Address the incorrect options: DNA replication does not occur before meiosis II; it happens before meiosis I during interphase. Additionally, meiosis produces four genetically diverse cells, not identical ones, due to the processes of crossing over and independent assortment.
Conclude with the correct event: The defining feature of meiosis II is the separation of sister chromatids into different daughter cells, resulting in haploid cells ready for fertilization or other biological processes.
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