Question

Which of the following sequences is an example of a point mutation of the DNA sequence -A-A-G-T G-C- point)O-A-A-A-T-G-c--G-TA-G-A-A-c-O-A-A-G-G-T-c

Answer 1

A: A-A-A-T-G-C

There has been a change from a guanine to an adenine at the third base

Answer 2

The right answer is A (substitution).

-A-A-G-T G-C-

-A-A-A-T G-C-

In genetics, point mutation is the generic terminology used to describe a mutation that causes a structural change in a gene. This type of mutation can impact between one and ten nucleotides. Insertion mutation, deletion mutation and substitution mutation are the three forms of existing point mutations.