In Drosophila, Lyra (Ly) and stubble (Sb) are dominant mutations located at locus 40 and 58, on chromosome 3. A recessive mutation with bright eyes was discovered and shown also to be on chromosome 3.  A map was obtained by crossing a female who was heterozygous for all three mutations to a male homozygous for the bright red mutation (temporarily will be called br).  The following data were obtained.   Ly       Sb      br       404                         +        +        br          2 Ly       +        br       75                           +        Sb      +          59 Ly       +        +        18                           +        Sb      br          16 Ly       Sb      +        4                             +        +        +          422   Diagram the cross and determine the location of the bright red mutation on chromosome 3

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