Scelta multipla
During prophase I of meiosis, which event occurs that increases genetic variation?
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9. Mitosis and Meiosis
Meiosis
Scelta multipla
In meiosis, during which stage do sister chromatid centromeres divide (separate)?
A
Anaphase I
B
Prophase I
C
Telophase I
D
Anaphase II
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Recall the two divisions in meiosis: Meiosis I and Meiosis II. Meiosis I separates homologous chromosomes, while Meiosis II separates sister chromatids.
Understand that during Anaphase I, homologous chromosomes are pulled apart, but sister chromatids remain attached at their centromeres.
Recognize that sister chromatid centromeres divide (separate) during Anaphase II, allowing sister chromatids to move to opposite poles.
Note that Prophase I and Telophase I are stages in Meiosis I and do not involve the separation of sister chromatids at the centromere.
Therefore, the stage where sister chromatid centromeres divide is Anaphase II.
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