Multiple Choice
During meiosis, at which stage does the number of chromosomes in a cell become reduced by half?
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9. Mitosis and Meiosis
Meiosis
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Homologous pairs of chromosomes align opposite of each other at the equator of a cell during which stage of meiosis?
A
Metaphase I
B
Anaphase I
C
Metaphase II
D
Prophase I
Verified step by step guidance1
Recall the stages of meiosis and their key events, focusing on how homologous chromosomes behave during each stage.
Understand that meiosis consists of two divisions: Meiosis I and Meiosis II, each with its own phases (Prophase, Metaphase, Anaphase, Telophase).
Identify that homologous pairs of chromosomes (each consisting of two sister chromatids) pair up and align together during Meiosis I, not Meiosis II.
Recognize that the stage where homologous pairs align opposite each other at the cell equator is Metaphase I, which is distinct from Metaphase II where individual chromosomes align.
Conclude that the correct stage for homologous pairs aligning opposite each other at the equator is Metaphase I.
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