The mutation shown in the sequence can be categorized as which type?

Question

Original DNA sequence:

A T A C G G T A G C A A
T A T G C C A T C G T T
Mutated DNA sequence:

A T A C G G T A G A A
T A T G C C A T C T T
(1 point)
Responses

substitution mutation
substitution mutation

deletion mutation
deletion mutation

chromosomal mutation
chromosomal mutation

insertion mutation

Answer 1

The type of mutation shown in the sequences is a substitution mutation.

In the original DNA sequence, the base pair in the second row changes from "G" to "A" in the mutated sequence:

• Original: A T A C G G T A G C A A
• Mutated: A T A C G G T A G A A

This change indicates that one base (in this case, "C" to "A") has been replaced by another base, which defines a substitution mutation.