Multiple Choice
In sexually reproducing organisms, what is the primary result of meiosis?
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9. Mitosis and Meiosis
Meiosis
Multiple Choice
During anaphase I of meiosis, what is the key chromosomal event that occurs?
A
Homologous chromosomes separate and move to opposite poles while sister chromatids remain together at their centromeres.
B
Chromosomes decondense and nuclear envelopes reform to produce two identical diploid nuclei.
C
Sister chromatids separate at the centromeres and move to opposite poles.
D
Crossing over between homologous chromosomes occurs, forming chiasmata.
Verified step by step guidance1
Recall the stages of meiosis, focusing on the events that occur during anaphase I.
Understand that meiosis I is the reductional division where homologous chromosomes are separated, unlike mitosis or meiosis II where sister chromatids separate.
Identify that during anaphase I, 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, meaning they do not separate until anaphase II.
Recognize that other events such as crossing over occur earlier (prophase I), and chromosome decondensation and nuclear envelope reformation happen after meiosis I is complete.
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