객관식
In the process of meiosis, which step is crucial for genetic variation during conjugation?
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12. Meiosis
Introduction to Meiosis
객관식
In what phase of meiosis does the nuclear envelope begin to break down?
A
Prophase I
B
Metaphase I
C
Telophase I
D
Anaphase I
검증된 단계별 안내1
Understand the process of meiosis, which consists of two consecutive divisions: Meiosis I and Meiosis II. Each division has several phases: Prophase, Metaphase, Anaphase, and Telophase.
Focus on Meiosis I, as the question specifically asks about the phases within this first division.
Recall the characteristics of Prophase I, where homologous chromosomes pair up and exchange genetic material through crossing over. This phase is crucial for genetic diversity.
During Prophase I, the nuclear envelope begins to break down, allowing the spindle fibers to access the chromosomes. This is a key event that distinguishes Prophase I from other phases.
Review the other phases of Meiosis I: Metaphase I, Anaphase I, and Telophase I, noting that the nuclear envelope breakdown is specific to Prophase I, as the other phases involve chromosome alignment, separation, and cell division.
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