A homologous gene is a gene inherited in two species by a common ancestor. In evolution, according to the concept of a molecular clock, neutral mutations accumulate at a relatively constant rate over evolutionary time. Closely related species diverge from a recent common ancestor than distantly related species. The gene sequence of various species accumulates independent mutations after they have diverged from each other.

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Chapter 21.4, Problem 1TYK

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Introduction:

A homologous gene is a gene inherited in two species by a common ancestor. In evolution, according to the concept of a molecular clock, neutral mutations accumulate at a relatively constant rate over evolutionary time. Closely related species diverge from a recent common ancestor than distantly related species. The gene sequence of various species accumulates independent mutations after they have diverged from each other.

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