Question 18
In tomatoes, A (red) is completely dominant over a (yellow), and B (round) is completely dominant over b (flattened). The loci assort independently. Two purebred plants with different genotypes are crossed and all F1 plants are red and round. F1 self-pollinates to form F2. Mean fruit masses are 120 g for red/round, 100 g for red/flattened, 90 g for yellow/round and 70 g for yellow/flattened. Every F2 plant produces exactly ten tomatoes. What is the average fruit yield per F2 plant, in grams?