Assume eight different strains of fly have been isolated,each shows a recessive white eye trait.Crosses are performed as follows (w)indicates white-eyed progeny, (R)indicates wild-type red eyes.

\begin{array} { l l l l l l l l l } & \mathrm { A } & \mathrm { B } & \mathrm { C } & \mathrm { D } & \mathrm { E } & \mathrm { F } & \mathrm { G } & \mathrm { H } \\\mathrm { A } & \mathrm { w } & \mathrm { w } & \mathrm { R } & \mathrm { R } & \mathrm { w } & \mathrm { R } & \mathrm { R } & \mathrm { w } \\\mathrm { B } & & \mathrm { w } & \mathrm { R } & \mathrm { R } & \mathrm { w } & \mathrm { R } & \mathrm { R } & \mathrm { w } \\\mathrm { C } & & & \mathrm { w } & \mathrm { w } & \mathrm { R } & \mathrm { R } & \mathrm { R } & \mathrm { R } \\\mathrm { D } & & & & \mathrm { w } & \mathrm { R } & \mathrm { R } & \mathrm { R } & \mathrm { R } \\\mathrm { E } & & & & & \mathrm { w } & \mathrm { R } & \mathrm { R } & \mathrm { w } \\\mathrm { F } & & & & & & \mathrm { w } & \mathrm { w } & \mathrm { R } \\\mathrm { G } & & & & & & & \mathrm { w } & \mathrm { R } \\\mathrm { H } & & & & & & & & \mathrm { w }\end{array}

Based on these crosses,how many different genes are present and what strains have mutations in the same gene as does strain A?
A) 2,B,E,and H
B) 3,B,and C
C) 3,B,C,and H
D) 3,B,E,and H
E) 4,B,and H

Red Green Colour Blindness Is More Common in Males Than

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