A coincident substitution occurs when

Question

Quizplus · Accepted Answer

A coincident substitution occurs when two or more independently evolving lineages undergo the same nucleotide substitution event at the same site in their DNA sequences. Option B describes such an event where nucleotide A changes to G in one lineage and A to C in the other lineage. Option A describes a synonymous substitution where the change in nucleotide does not affect the protein sequence. Option C describes parallel substitutions that occur independently in two or more lineages. Option D describes a successive substitution where one nucleotide is replaced by another and then another in the same lineage. Option E describes a reversal substitution where a nucleotide changes back to its original state in the same lineage.

A Coincident Substitution Occurs When