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Rec A doesn’t____________________

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Rec A doesn’t____________________

(a) Line up the homologous chromosome with the one it surrounds

(b) Perform spooling

(c) Cleaves at recombination site

(d) Help in branch migration

The question was asked in an international level competition.

Question is taken from Homologous DNA Recombination in chapter Genetic Recombination of Cytogenetics

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Right answer is (c) Cleaves at recombination site

For explanation: Rec A helps to take up the homologous chromosome from the media and it aligns it in a manner helping in recombination. It also helps in branch migration but it plays no role in cleaving the DNA.

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