Multiple Choice
During meiosis, is the chromosome number doubled at any stage?
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9. Mitosis and Meiosis
Meiosis
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Which of the following events occurs during anaphase I of meiosis?
A
The nuclear envelope reforms around chromosomes
B
Sister chromatids are separated and move to opposite poles
C
Chromosomes align individually at the metaphase plate
D
Homologous chromosomes are separated and pulled to opposite poles
Verified step by step guidance1
Recall the main stages of meiosis I and meiosis II, focusing on the key events that characterize each phase.
Understand that during anaphase I of meiosis, homologous chromosomes (each consisting of two sister chromatids) are separated and pulled to opposite poles of the cell.
Contrast this with anaphase of mitosis or anaphase II of meiosis, where sister chromatids are separated, not homologous chromosomes.
Note that the nuclear envelope reforms during telophase, not anaphase, and chromosomes align individually at the metaphase plate during metaphase, not anaphase.
Therefore, identify that the correct event during anaphase I is the separation and movement of homologous chromosomes to opposite poles.
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