Consider the following four sttements (1,2,3 and 4) and select the right option for incorrect statements .
(1) Mendelian experiments had large sampling size, which gave greater credibility to the date that he collected .
(2) Recessive allele in influences the appeareance of phenotype even in the presence of an altemative allele.
(3) Multiple alleles can be found only when population studies are made .
(4) In `F_(2)` generation of Mendelian monohybrid cross, the tall and dwarf traits were identical to their parental types and showed blending .

Options

A. 1 and 3
B. 3 and 4
C. 2 and 4
D. 2 and 3

Answer

To solve the question regarding the correctness of the four statements, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Statement 1: Mendelian experiments had a large sampling size, which gave greater credibility to the data that he collected.**
- **Analysis:** This statement is correct. Mendel conducted his experiments on a large number of pea plants, which allowed him to gather reliable data and make valid conclusions about inheritance patterns. The larger the sample size, the more credible the results.
- **Conclusion:** Statement 1 is correct.

2. **Statement 2: Recessive allele influences the appearance of phenotype even in the presence of an alternative allele.**
- **Analysis:** This statement is incorrect. According to Mendel's law of dominance, a recessive allele does not influence the phenotype when a dominant allele is present. The dominant allele masks the expression of the recessive allele.
- **Conclusion:** Statement 2 is incorrect.

3. **Statement 3: Multiple alleles can be found only when population studies are made.**
- **Analysis:** This statement is correct. Multiple alleles refer to the existence of more than two alleles for a single gene within a population. To observe multiple alleles, one must study a population rather than a single individual, as an individual can only possess two alleles at most.
- **Conclusion:** Statement 3 is correct.

4. **Statement 4: In the F2 generation of Mendelian monohybrid cross, the tall and dwarf traits were identical to their parental types and showed blending.**
- **Analysis:** This statement is incorrect. In Mendelian inheritance, traits do not blend. In the F2 generation of a monohybrid cross, the phenotypic ratio is 3:1, where the dominant trait (tall) is expressed in three out of four plants, while the recessive trait (dwarf) is expressed in one. There is no blending of traits; they remain distinct.
- **Conclusion:** Statement 4 is incorrect.

### Summary of Incorrect Statements:
- The incorrect statements are **Statement 2** and **Statement 4**.

### Final Answer:
The correct option for the incorrect statements is **C: 2 and 4**.

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