Question

A gene sequence reads ATCGAT. which represents a substitution mutation.

Answer 1

Answer:

D

Explanation:

A substitution is where a base is substituted by another base

A. ATGAT  - this is not a substitution, the C has been deleted

B. UAGCUA  - this is not a substitution, but is the complementary mRNA sequence (you can tell because there are Us instead of Ts)

C. TAGCTA  - this is not a substitution, but is the complementary DNA sequence

D. ATGGAT​ - this is a substitution, the C in the original sequence has been replaced (substituted) by a G.