객관식
In sexually reproducing eukaryotes, the process of meiosis produces which of the following outcomes?
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9. Mitosis and Meiosis
Meiosis
객관식
During which stage of meiosis does crossing over between homologous chromosomes occur?
A
Prophase I
B
Anaphase II
C
Metaphase I
D
Telophase I
검증된 단계별 안내1
Recall that meiosis consists of two sequential divisions: meiosis I and meiosis II, each with distinct stages (prophase, metaphase, anaphase, telophase).
Understand that crossing over is the process where homologous chromosomes exchange genetic material, increasing genetic diversity.
Identify that crossing over occurs when homologous chromosomes pair up closely, forming structures called tetrads or bivalents.
Recognize that this pairing and exchange happen during prophase I of meiosis I, when homologous chromosomes undergo synapsis.
Conclude that crossing over does not occur in later stages like metaphase I, anaphase II, or telophase I, but specifically during prophase I.
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