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Three genes in Drosophila , X, Y and Z are linked. However, the order of the...

Three genes in Drosophila , X, Y and Z are linked. However, the order of the genes is not known. Two true breeding individuals of the genotype (genes not given in the correct order) x+y+z/x+y+z and x y z+/x y z+ were crossed and the FI trihybrid was test crossed. Double crossover genotypes were x y+z/x y z and x+yz+/ z y z. Based on this information the correct order of genes is [________________________].

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Answer=Y-X-Z

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