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Rates of Crossover

APBIO-2XPV1S

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
682 Wild-Type
517 Black
489 Arc
716 Arc-Black

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How many linkage map units apart are these two genes?

A

5.8 LMU

B

42 LMU

C

58 LMU

D

It is not possible to determine from the data given.