In D. melanogaster, the alleles dp+ and dp determine long versus short wings, and e+ and e determine gray versus ebony body. A dihybrid cross was carried out to produce flies homozygous for both dp and e. The following phenotypes were obtained in the F2 generation:
long wing, gray body 462
long wing, ebony body 167
short wing, gray body 127
short wing, ebony body 44
Test these data for agreement with the 9:3:3:1 ratio expected in the two pairs of alleles undergo independent assortment.