Question

Two DNA (Top) and RNA strands (bottom) are shown below. Example 1 is the original. Example 2 has a mutation. What kind of mutation is shown in Example 2?



(1 point)
Responses

Deletion
Deletion

Chromosomal
Chromosomal

Substitution
Substitution

Insertion
Insertion
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Answer 1

I can answer, but I don’t see the pictured strands. Could you either upload the image or paste the DNA/RNA sequences for Example 1 and Example 2?

If you want to decide it yourself, here’s how to tell:

- Substitution (point mutation): one base is replaced by a different base (sequence length unchanged). Example: ATG → ACG.
- Deletion: one or more bases are removed (sequence length is shorter; often causes a frameshift if not a multiple of 3).
- Insertion: one or more bases are added (sequence length is longer; often causes a frameshift if not a multiple of 3).
- Chromosomal: large-scale change affecting many genes or whole chromosome segments (duplication, inversion, translocation, large deletion).

Compare Example 1 and Example 2: if the same length but one letter differs → substitution; if a letter is missing → deletion; if there’s an extra letter → insertion; if many genes/segments rearranged → chromosomal. Send the sequences or the image and I’ll pick the exact answer.