Question

select the correct answer.
which type of mutation does the change in this nucleotide sequence represent?
gcttagcgc → gcttatagcgc
a. duplication
b. inversion
c. substitution
d. translocation

Explanation:

To determine the mutation type, analyze the nucleotide sequences: Original: GCTTAGCGC, Mutated: GCTTATAGCGC. A segment (TA) is duplicated (inserted as an extra copy). Duplication involves repeating a nucleotide segment. Inversion reverses a segment, substitution replaces one nucleotide, and translocation moves a segment between chromosomes. Here, the addition of "TA" (duplicating an existing or new segment) fits duplication.

Answer:

A. duplication