Question: A crossover has occurred in the bivalent shown here. If a second crossover occurs in the same region between these two genes, which two chromatids

A crossover has occurred in the bivalent shown here.

A B 12 AO B a b 3 a b 4

If a second crossover occurs in the same region between these two genes, which two chromatids would be involved to produce the following outcomes?
A. 100% recombinants B. 0% recombinants C. 50% recombinants

A B 12 AO B a b 3 a b 4

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