1979 Volume 54 Issue 5 Pages 317-324
Walking ability of Drosophila melanogaster was measured by Benzer's countercurrent apparatus. Second chromosomes isolated from a natural population carried much variation in walking abilities when examined in the dark, in the light and toward the light source conditions. Walking abilities in the three conditions were positively correlated both in the homozygotes and heterozygotes, and were mainly controlled by additive polygenes.