When flies having a gray body and normal wings were crossed with flies having a black body and vestigial wings, the F2 generation showed a phenotypic ratio of 3:1, and not 9:3:3:1.
Which of the following could be a correct explanation for this ratio?
A - Genes for body and wing size were on the same chromosome and inherited together
B - Genes for body and wing size assort independently
C - Genes for body color and wing size are inherited separately from each parent
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