If both Mango and Apple tree can do photosynthesis, then how different plants are having different fruits?

Photosynthesis is the mode of nutrition performed by all the green plants in the presence of sunlight and carbon dioxide to prepare their own food.

While the feature of the plant to bear characteristic fruit and type of fruit depends upon the genetic information stored in the DNA of the plant. Genetic composition of different species of living organisms, either plants or animals vary from each other therefore mango tree bears mango fruit and apple tree bears apple fruit.