Multiple Choice
In meiosis, what is the direct outcome of completion of meiosis II for a single cell that entered meiosis I (assuming typical animal meiosis and no nondisjunction)?
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9. Mitosis and Meiosis
Meiosis
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During interphase preceding meiosis I, which key event must occur to ensure that each chromosome consists of two sister chromatids?
A
DNA replication occurs during S phase, producing sister chromatids for each chromosome.
B
Homologous chromosomes separate into different cells, reducing the chromosome number by half.
C
Crossing over occurs between homologous chromosomes, creating chiasmata.
D
Sister chromatids separate at the centromere and move to opposite poles.
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