Assume Eight Different Strains of Fly Have Been Isolated, Each

question 55

Multiple Choice

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. 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

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