Scelta multipla
During which phase of meiosis does crossing over (homologous recombination) occur?
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9. Mitosis and Meiosis
Meiosis
Scelta multipla
During which stage of meiosis do homologous chromosomes separate from each other and move to opposite poles of the cell?
A
Anaphase I
B
Metaphase I
C
Anaphase II
D
Prophase I
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Recall the main stages of meiosis: Prophase I, Metaphase I, Anaphase I, Telophase I, followed by Meiosis II stages.
Understand that during Prophase I, homologous chromosomes pair up and exchange genetic material (crossing over), but they do not separate yet.
During Metaphase I, homologous chromosome pairs align at the metaphase plate, preparing for separation.
In Anaphase I, homologous chromosomes are pulled apart by spindle fibers and move toward opposite poles of the cell. This is the key stage where homologous chromosomes separate.
Anaphase II involves the separation of sister chromatids, not homologous chromosomes, so it occurs later in meiosis.
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