When Morgan conducted dihybrid cross on Drosophila like Mendel did with pea plants, the `F_(2)` ratios deviated significantly from than of Mendel's `F_(2)` ratio. Write the explanation Morgan and his group gave to the observations they obtained from their experiment.

Explanation

### Step-by-Step Solution:

1. **Introduction to Dihybrid Cross**:
- A dihybrid cross involves studying the inheritance of two different traits simultaneously. In Mendel's experiments with pea plants, he observed a 9:3:3:1 phenotypic ratio in the F2 generation, which is indicative of independent assortment of traits.

2. **Mendel's Law of Independent Assortment**:
- According to Mendel's law, genes controlling different traits assort independently during gamete formation. This means that the inheritance of one trait does not affect the inheritance of another trait.

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