Question

Sometimes, it is also possible that two sequences have derived from a common ancestor, but may have diverged to such an extent that the common ancestral relationships are not recognizable at the sequence level.

(a) True

(b) False

The question was posed to me in an international level competition.

This is a very interesting question from Sequence Homology Versus Sequence Similarity and Identity topic in chapter Pairwise Sequence Alignment of Bioinformatics

Answer 1

The correct answer is (a) True

Easiest explanation: There are examples of such paralogous genes that have distinct functions but similar origin. In that case, the distant evolutionary relationships have to be detected using other methods.