A Drosophila Fly Heterozygous for Alleles for Black Body, Dumpy

Multiple Choice

A Drosophila fly heterozygous for alleles for black body, dumpy wings, and purple eyes was test-crossed to a fly that was homozygous recessive for all three genes. The genes are all on the same chromosome. The offspring had the following phenotypes in the following numbers:
$$\begin{array} { | l | c | } \hline \text { Phenotype } & \text { Number of offspring } \\\hline \text { wild type } & 225 \\\hline \text { black body, purple eyes, dumpy wings } & 238 \\\hline \text { dumpy wings } & 122 \\\hline \text { black body, purple eyes } & 135 \\\hline \text { black body, dumpy wings } & 15 \\\hline \text { purple eyes } & 19 \\\hline \text { purple eyes, dumpy wings } & 6 \\\hline \text { black body } & 5 \\\hline\end{array}$$ What is the order of the genes on the chromosome?

A) black - purple - dumpy
B) black - dumpy - purple
C) purple - black - dumpy
D) dumpy - purple - black