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Bob2
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You are interested in the linkage pattern of 2 genes in the fruit fly, Drosophila melanogaster. These genes are glass (transparent) eyes where wild-type is dominant to glass eyes, and stripe body pattern, where wild-type is dominant to striped body. Previous reports indicate that these genes are linked with a distance of 30% recombination frequency between them. You cross a truebreeding glass fly to a truebreeding striped fly. The F1 flies are then testcrossed. Your goal is to count 1,000 F2 flies from this cross. How many flies among each of the 4 different phenotypes do you expect to count among the F2 progeny?