In His Analysis of RII in Phage, Benzer Assayed Complementation

question 30

Multiple Choice

In his analysis of rII in phage, Benzer assayed complementation. Suppose you try your hand at this with several mutants and get the following results (+ = complementation) : $\begin{array}{ll}42 \text { and } 62 & + \\42 \text { and } 83 & - \\62 \text { and } 63 & - \\62 \text { and } 74 & + \\42 \text { and } 74 & \text { - } \\42 \text { and } 75 & + \\62 \text { and } 75 & \text { - }\end{array}$ What can you conclude?

• A) Mutations 62 and 74 are in the same gene.
• B) Mutation 63 is not in the same gene as either 62 or 42.
• C) Mutations 62, 63, and 74 are in the same gene.
• D) Mutations 42 and 75 are in the same gene.
• E) Mutations 42 and 74 are in the same gene.

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