Select wrong statement with respect to multiple alleles -

Options

A. It can be detected only in a population
B. They are mutant forms of the same gene.
C. Number of phenotypes in multiple alleles is calculated by formula 2n + 1.
D. They occupy same locus on homologous chromosomes.

Answer

To solve the question "Select the wrong statement with respect to multiple alleles," we will analyze each of the provided statements one by one.

### Step-by-Step Solution:

1. **Understanding Multiple Alleles**:
- Multiple alleles refer to the existence of more than two alleles for a particular gene within a population. However, an individual can only have two alleles (one from each parent) for that gene.

2. **Analyzing the Statements**:
- **Statement 1**: "It can be detected only in a population."
- This statement is **correct**. Multiple alleles can exist in a population, but an individual can only have two alleles.

- **Statement 2**: "They are mutant forms of the same gene."
- This statement is also **correct**. Multiple alleles are indeed different variants (mutations) of the same gene.

- **Statement 3**: "Number of phenotypes in multiple alleles is calculated by the formula 2n + 1."
- This statement is **incorrect**. The formula 2n + 1 is used to calculate the number of phenotypes in polygenic inheritance, not for multiple alleles. For multiple alleles, the number of phenotypes can vary based on the alleles present but does not follow this formula.

- **Statement 4**: "They occupy the same locus on the homologous chromosomes."
- This statement is **correct**. All alleles of a gene, including multiple alleles, occupy the same locus on homologous chromosomes.

3. **Conclusion**:
- The wrong statement with respect to multiple alleles is **Statement 3**: "Number of phenotypes in multiple alleles is calculated by the formula 2n + 1."

### Final Answer:
The wrong statement is: **"Number of phenotypes in multiple alleles is calculated by the formula 2n + 1."**

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