Question

the dna sequence reads acgttcatt before a mutation occurs. after the mutation, the dna sequence reads atcgttcatt. which type of mutation occurred?
substitution
insertion
deletion
point

Explanation:

A substitution mutation occurs when one nucleotide is replaced by another. In the given DNA sequences, the second - nucleotide 'C' in the original sequence 'ACGTTTCATT' is replaced by 'T' in the mutated sequence 'ATCGTTTCATT'. An insertion mutation adds one or more nucleotides, a deletion mutation removes nucleotides, and a point mutation is a more general term that includes substitution, insertion, and deletion at a single - nucleotide level. Here, the specific type is substitution.

Answer:

substitution