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A Female Fruit Fly with Singed Bristles Was Mated with a Male

Question 33

Multiple Choice

A female fruit fly with singed bristles was mated with a male from a true-breeding wild-type stock with long bristles.All of the F1 females had wild-type bristles and all of the F1 males had singed bristles.If the F1 flies are intercrossed,the expected ratio of long to singed bristles in the F2 flies is


A) 1:0 in both sexes (i.e. ,males and females will all have long bristles) .
B) 3:1 in both sexes.
C) 3:1 in females,while all the males will have singed bristles.
D) 1:1 in females,while all the males will have singed bristles.
E) 1:1 in both sexes.

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