Assertion (A): Genetic codes are commaless.
Reason (R): Genetic codes are overlapping.

Options

A. Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A)
B. Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
C. Assertion (A) is true but reason (R) is false.
D. Assertion (A) is false but reason (R) is true.

Explanation

To solve the question regarding the assertion and reason about genetic codes, we can break it down into clear steps:

### Step-by-Step Solution:

1. **Understanding the Assertion (A)**:
- The assertion states that "Genetic codes are commaless."
- This means that there are no punctuation marks (commas) between the codons in the genetic code. Codons are read continuously without any gaps.

2. **Understanding the Reason (R)**:
- The reason states that "Genetic codes are overlapping."
- Overlapping would imply that one nucleotide can be part of more than one codon, which is not the case in the standard genetic code.

3. **Evaluating the Assertion**:
- The assertion is correct. Genetic codes are indeed commaless. Codons are read in a continuous sequence without any interruptions.

4. **Evaluating the Reason**:
- The reason is incorrect. Genetic codes are not overlapping. Each codon consists of three nucleotides, and each nucleotide is part of only one codon. Therefore, there is no overlap.

5. **Conclusion**:
- Since the assertion is correct and the reason is incorrect, the correct option is that the assertion is right but the reason is wrong.

### Final Answer:
The correct option is **C**: Assertion is right but reason is wrong.

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