Dihybrid cross proves the law of :-

Options

A. Segregatin
B. Purity of gametes
C. Dominance
D. Independent assortment

Answer

### Step-by-Step Solution:

1. **Understanding Dihybrid Cross**: A dihybrid cross involves two traits, each represented by two alleles. For example, consider traits such as seed shape (round vs. wrinkled) and seed color (yellow vs. green).

2. **Identifying the Traits**: In our example, we have:
- Seed Shape: Round (R) is dominant over Wrinkled (r)
- Seed Color: Yellow (Y) is dominant over Green (y)

3. **Gamete Formation**: When performing a dihybrid cross, we consider the gametes produced by the parents. If we take a parent with genotype RrYy (heterozygous for both traits), the possible gametes are RY, Ry, rY, and ry.

4. **Law of Independent Assortment**: The dihybrid cross demonstrates the Law of Independent Assortment, which states that alleles for different traits segregate independently during gamete formation. This means that the inheritance of one trait does not affect the inheritance of another trait.

5. **F2 Generation**: When we cross two dihybrids (e.g., RrYy x RrYy), we can observe the phenotypic ratios in the F2 generation. The resulting offspring will show a variety of combinations of the traits, confirming that the traits assort independently.

6. **Conclusion**: Therefore, the dihybrid cross proves the Law of Independent Assortment, which is a fundamental principle of genetics.