The frequency of recombination between gene pairs on the same chromosome as a measure of the distance between genes was explained by?

Correct option is C. Alfred Sturtevant. Alfred Sturtevant explained that the frequency of recombination between gene pairs on the same chromosome is a measure of the distance between the genes. The distance between the genes is inversely proportional to the frequency of recombination. So, the correct answer is 'Alfred Sturtevant'.