A scientist is trying to determine if tomato plants have disease resistance genes against a bacterium that infects them. After exposing a crop of 1000 tomato plants to the pathogen, the scientist examines the leaves for signs of infection. The results are shown in the table. The scientist then breeds a second generation using just the plants with no infected leaves as parent plants. He exposes this generation to the pathogen as well and records his results. Do you think disease resistance genes are present in the tomato plants?