Which of the following statement confirm the law of dominance

Options

A. 3:1 ratio in `F_(2)` generation
B. It is the conclusion of a dihybrid cross
C. Alleles do not show any blending and both characters recovered as such in` F_(2)` generation
D. Alleles of a pair segregate from each other such that gamete receives only one of the two factors

Answer

To determine which statement confirms the law of dominance, we need to understand the concept of dominance in genetics. The law of dominance states that in a heterozygote, one allele (the dominant one) masks the expression of another allele (the recessive one). Here’s how we can analyze the options step by step:

### Step-by-Step Solution:

1. **Understanding the Law of Dominance**:
- The law of dominance was proposed by Gregor Mendel. It states that when two different alleles are present in a genotype, the dominant allele will express its trait while the recessive allele will not.

2. **Analyzing the F2 Generation Ratio**:
- In a monohybrid cross (where we consider one trait), Mendel observed a phenotypic ratio of 3:1 in the F2 generation. This indicates that three offspring show the dominant trait, and one shows the recessive trait.

3. **Identifying the Correct Statement**:
- The first statement mentions the 3:1 ratio in the F2 generation, which directly confirms the law of dominance. This is because the presence of the dominant allele (represented as capital R) results in the dominant phenotype being expressed more frequently than the recessive phenotype (represented as small r).

4. **Evaluating Other Options**:
- The second statement refers to a dihybrid cross, which involves two traits and does not directly relate to the law of dominance.
- The third statement discusses alleles not blending and both characters being recovered in the F2 generation, which does not specifically confirm the law of dominance.
- The fourth statement about alleles segregating into gametes refers to the law of segregation, not dominance.

5. **Conclusion**:
- The statement that confirms the law of dominance is the one that describes the 3:1 ratio in the F2 generation resulting from a monohybrid cross.

### Final Answer:
The statement that confirms the law of dominance is the one that describes the 3:1 ratio in the F2 generation.