Explain Mutations and Protein Effects Practice Test

A gene’s coding DNA sequence includes ATG-AAA-CTT-GGA. A deletion removes the first A in the second codon, producing ATG-AAC-TTG-GA... (codon grouping shifts after the deletion).

Which best describes the pathway from this DNA change to a possible change in organism traits?

A gene has the coding DNA triplet GAA at one position. A substitution changes it to GAG. In this case, the protein produced is unchanged.

Which term best describes this type of mutation outcome?