Multiple Choice
Meiosis accomplishes all of the following EXCEPT:
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9. Mitosis and Meiosis
Meiosis
Multiple Choice
During which stage of meiosis does crossing over between homologous chromosomes occur?
A
Prophase I (specifically during pachytene)
B
Prophase II
C
Anaphase I
D
Metaphase I
Verified step by step guidance1
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 during meiosis I, when homologous chromosomes pair up closely in a process called synapsis.
Focus on prophase I of meiosis I, which is subdivided into stages: leptotene, zygotene, pachytene, diplotene, and diakinesis.
Recognize that crossing over specifically takes place during the pachytene stage of prophase I, when the synaptonemal complex is fully formed and homologous chromosomes exchange segments.
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