In Drosophila, the gene for wing shape (wild type or arc), and the gene for body color (wild type or black) are located on the same chromosome. A test cross was performed between a fly heterozygous for both wing shape and body color with another fly homozygous recessive for both traits. The cross resulted in the numbers of each offspring:
|Number of Offspring||Trait|
How many linkage map units apart are these two genes?