Fruit flies with gray, normal wings (BbVv) are crossed with flies that have black, vestigial wings (bbvv).The difference in actual results and expected results of this cross indicates that the alleles for body colour and wing length:

Explanation

The correct answer is that the alleles for body color and wing length are linked on homologous chromosomes. This linkage means that the alleles are located close to each other on the same chromosome, reducing the chance of recombination during meiosis and resulting in a pattern of inheritance that deviates from the expected Mendelian ratios. The other options are incorrect because they do not account for the observed deviation in expected versus actual results. A wide range of phenotypes would suggest a polygenic trait, codominance is about both alleles being fully expressed, and pleiotropy involves a single gene influencing multiple traits.