Two Phage Phenotypes Are Controlled by the Genes a and B

question 10

Short Answer

Two phage phenotypes are controlled by the genes a and b. In a mapping experiment, a culture of bacteria is infected simultaneously with an a^-b⁺ strain and an a⁺b^- strain. When plaques are analyzed, five out of 1000 have the a⁺b⁺ or a^-b^- phenotype. Based on the information, how far apart are genes a and b?

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