DNA sequence is the basis of grouping organisms in

Options

A. Karyotaxonomy
B. Cytotaxonomy
C. Phenetics
D. Chemotaxonomy

Answer

To solve the question "DNA sequence is the basis of grouping organisms in," we will analyze each of the provided options step by step.

### Step 1: Understand the options
1. **Karyotaxonomy**: This method classifies organisms based on their chromosomal structure and number.
2. **Cytotaxonomy**: This classification is based on the structure and constituents of cells, including organelles like the nucleus and cytoplasm.
3. **Phonetics**: This approach classifies organisms based on morphological characteristics or phenotypic traits.
4. **Chemotaxonomy**: This classification is based on the chemical constituents of organisms, which includes nucleic acids like DNA and RNA.

### Step 2: Identify the correct option
- Since the question specifically mentions "DNA sequence," we need to focus on the option that relates to the analysis of DNA.
- **Chemotaxonomy** is the only option that directly involves the chemical constituents of organisms, including DNA.

### Step 3: Conclusion
- Based on the analysis, the correct answer to the question is **chemotaxonomy**. This method uses DNA sequences as a basis for grouping organisms.

### Final Answer
**Chemotaxonomy** is the classification of organisms based on their chemical constituents, including DNA sequences.

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