Multiple Choice
In humans, meiosis results in four cells. Each of these cells contains how many chromosomes?
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9. Mitosis and Meiosis
Meiosis
Multiple Choice
During meiosis, what key event occurs during anaphase I?
A
Crossing over occurs between non-sister chromatids of homologous chromosomes.
B
Chromosomes align individually at the metaphase plate with sister chromatids oriented toward opposite poles.
C
Homologous chromosomes separate and move to opposite poles while sister chromatids remain joined.
D
Sister chromatids separate and move to opposite poles.
Verified step by step guidance1
Recall the stages of meiosis I and meiosis II, focusing on the behavior of chromosomes during each phase.
Understand that during anaphase I of meiosis, homologous chromosomes (each consisting of two sister chromatids) are pulled apart to opposite poles of the cell.
Note that sister chromatids remain attached at their centromeres during anaphase I, unlike in mitosis or meiosis II where sister chromatids separate.
Recognize that crossing over occurs earlier, during prophase I, and that chromosome alignment at the metaphase plate happens during metaphase I, not anaphase I.
Summarize that the key event in anaphase I is the separation of homologous chromosomes to opposite poles, while sister chromatids stay together.
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