A substitution mutation occurs when one base pair in the DNA sequence is replaced by another base pair.
Let's analyze the given sequences for substitutions:
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Original Sequences:
- Sequence 1: C G T T A C T G C A A T
- Sequence 2: G C A A T G A C G T T A
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Options:
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Option 1:
- Sequence: C G T C T A C T G C A A T
- Original: C G T T A C T G C A A T
- Mutation: The second base 'T' is replaced with 'C' (substitution).
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Option 2:
- Sequence: C G T A C T G C A A T
- Original: C G T T A C T G C A A T
- Mutation: The fourth base 'T' is replaced with 'A' (substitution).
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Option 3:
- Sequence: C G T T A C T G C A A T
- Original: C G T T A C T G C A A T
- No mutation present.
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Option 4:
- Sequence: C G T G A C T G C A A T
- Original: C G T T A C T G C A A T
- Mutation: The 'T' is replaced with 'G' (substitution).
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So we can see that both option 1 and option 4 show a substitution mutation.
Correct Answers:
- C G T C T A C T G C A A T
- C G T G A C T G C A A T
Please choose one based on your intended answer format. If only one option is to be selected, the first option (C G T C T A C T) is a correct choice for showing a substitution mutation.