Generalized transduction by phage P1 of four E. coli genes (a, b, c, and d) shows the following percentages of cotransduction: $$\begin{array} { l l l r }
a - b & 51 \% & b - c & 2 \% \
b - d & 12 \% & a - d & 40 \% \
a - c & 19 \% & c - d & 79 \%
\end{array}$$ What is the CORRECT order of the four genes?

Question

Generalized transduction by phage P1 of four E. coli genes (a, b, c, and d) shows the following percentages of cotransduction: $$\begin{array} { l l l r } 
a - b & 51 \% & b - c & 2 \% \
b - d & 12 \% & a - d & 40 \% \
a - c & 19 \% & c - d & 79 \%
\end{array}$$ What is the CORRECT order of the four genes?

Quizplus · Accepted Answer

The order is determined by the highest cotransduction percentages, indicating closer proximity. The highest percentages are c-d (79%) and a-b (51%), suggesting these pairs are closest. The order b-a-d-c fits all given percentages.

Generalized Transduction by Phage P1 of Four E a−b51%b−c2%b−d12%a−d40%a−c19%c−d79%\begin{array} { l l l r } a - b & 51 \% & b - c & 2 \% \\b - d & 12 \% & a - d & 40 \% \\a - c & 19 \% & c - d & 79 \%\end{array}a−bb−da−c​51%12%19%​b−ca−dc−d​2%40%79%​

Generalized Transduction by Phage P1 of Four E $\begin{array} { l l l r } a - b & 51 \% & b - c & 2 \% \\b - d & 12 \% & a - d & 40 \% \\a - c & 19 \% & c - d & 79 \%\end{array}$