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Original Question
A DNA segment has base order CCC ATA GCT. Which copy exhibits a deletion in the first codon triplet and then a substitution mut...Asked by Rai
A DNA segment has base order CCC ATA GCT. Which copy exhibits a deletion in the first codon triplet and then a substitution mutation?
Responses
CCA ATA GCT
CCA ATA GCT
CCA TAG CT
CCA TAG CT
CCA TAA CT
CCA TAA CT
CCC TAG CT
CCC TAG CT
Responses
CCA ATA GCT
CCA ATA GCT
CCA TAG CT
CCA TAG CT
CCA TAA CT
CCA TAA CT
CCC TAG CT
CCC TAG CT
Answers
There are no human answers yet.
Answered by
GPT-4o mini
To identify which copy exhibits a deletion in the first codon triplet and then a substitution mutation, we first need to analyze the original DNA sequence and understand the changes represented by each response.
Original DNA segment: **CCC ATA GCT**
We break it into codon triplets:
- First codon: **CCC**
- Second codon: **ATA**
- Third codon: **GCT**
Now, we need to assess each response:
1. **CCA ATA GCT**:
- Change: CCC → CCA (substitution)
- No deletion in the first codon.
2. **CCA TAG CT**:
- Change: CCC → CCA (substitution) and deletion of both the second codon (**ATA**) and the third codon (**GCT**).
- Deletion occurred, but this appears to go beyond just a deletion in the first codon.
3. **CCA TAA CT**:
- Change: CCC → CCA (substitution) and deletion of the third codon (**GCT**).
- Again, this does not reflect just a deletion in the first codon.
4. **CCC TAG CT**:
- Change: None in the first codon (remains CCC), but the second codon has changed from **ATA** to **TAG** (substitution).
- No deletion has occurred.
Given these analyses, none of the options provided seem to meet the criteria of having a deletion only in the first codon triplet followed by a substitution mutation.
If a deletion was to occur only in the first codon, we would expect something like **CC_ATA GCT** (removal of one base) and then a substitution. However, since this isn't provided, it seems all examples deviate from your specific request.
If I had to infer, the response that most closely matches a simple change in the first codon with a substitution might be **CCA ATA GCT**, but it doesn't fit the criteria of containing both a deletion and a substitution as defined.
Please confirm the requirements or provide clarifications if specific answers are indeed required!
Original DNA segment: **CCC ATA GCT**
We break it into codon triplets:
- First codon: **CCC**
- Second codon: **ATA**
- Third codon: **GCT**
Now, we need to assess each response:
1. **CCA ATA GCT**:
- Change: CCC → CCA (substitution)
- No deletion in the first codon.
2. **CCA TAG CT**:
- Change: CCC → CCA (substitution) and deletion of both the second codon (**ATA**) and the third codon (**GCT**).
- Deletion occurred, but this appears to go beyond just a deletion in the first codon.
3. **CCA TAA CT**:
- Change: CCC → CCA (substitution) and deletion of the third codon (**GCT**).
- Again, this does not reflect just a deletion in the first codon.
4. **CCC TAG CT**:
- Change: None in the first codon (remains CCC), but the second codon has changed from **ATA** to **TAG** (substitution).
- No deletion has occurred.
Given these analyses, none of the options provided seem to meet the criteria of having a deletion only in the first codon triplet followed by a substitution mutation.
If a deletion was to occur only in the first codon, we would expect something like **CC_ATA GCT** (removal of one base) and then a substitution. However, since this isn't provided, it seems all examples deviate from your specific request.
If I had to infer, the response that most closely matches a simple change in the first codon with a substitution might be **CCA ATA GCT**, but it doesn't fit the criteria of containing both a deletion and a substitution as defined.
Please confirm the requirements or provide clarifications if specific answers are indeed required!
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