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What is the level of sequence homology required for site specific recombination?

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What is the level of sequence homology required for site specific recombination?

(a) Only homologous chromosomes participate

(b) A homologous stretch of 3-5 kb

(c) A homologous stretch of 20-200bp

(d) No sequence homology necessary

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The above asked question is from Site-Specific Recombination in portion Genetic Recombination of Cytogenetics

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The correct option is (c) A homologous stretch of 20-200bp

Best explanation: Site specific recombination takes place between regions of very short sequence homology about 20-200bp. It can occur between non-homologous chromosomes as well.

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