In a cell you see 23 pairs of chromosomes (homologous chromosomes) forming a tetrad. Crossing over is occurring. What phase of meiosis is this?

A. Prophase I (crossing over ONLY occurs in prophase I)
B. Prophase II
C. Metaphase II
D. Telophase II


Ans: A. Prophase I (crossing over ONLY occurs in prophase I)

Biology & Microbiology

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