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Question: assign gene symbols and for each cross determine the genotypes...

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Assign gene symbols and, for each cross, determine the genotypes of the parents. Possible symbols would be (using standard Drosophila symbolism) straight wings w short bristles b Drag the terms on the left to the appropriate blanks on the right. Not all terms will be used. Review The wild-type (normal) fruit fly, Drosophila melanogaster, has straight wings and long bristles. Mutant strains have been isolated that have either curled wings or short bristles. The genes representing these two mutant traits are located on separate chromosomes. Carefully examine the data from the five crosses shown below (running across both columns). curled wings w long bristles b straight wings, long bristles Cross straight wings, curled wings, curled wings, short bristles long bristles short bristles 1. straight, short x straight, short 2. straight, long x straight, long 3. curled, long X straight, short 4. straight, short x straight, short 5. curled, short 30 90 10 30 Cross 1: 120 40 0 Cross 2 40 40 40 Cross 3 40 120 0 Cross 4: 20 20 60 straight, short Cross 5: (one parent could be w w)

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