Answer : B- Both loci 1 and 2 are in linkage disequilibrium with genes that affects kernal size because during back cross the genotype distribution is unequal due to medium and small kernal size interaction. Solution Answer : B- Both loci 1 and 2 are in linkage disequilibrium with genes that affects kernal size because during back cross the genotype distribution is unequal due to medium and small kernal size interaction..