試題詳解

24. Suppose gene A is orthologous in species 1 and species 2, and gene B is paralogous to gene A in species 1. Suggest a sequence of two evolutionary events that could result in the following: Gene A differs considerably between species, yet gene A and gene B show little sequence divergence from each other.
(A) Speciation =＞ gene duplication
(B) Speciation =＞ gene recombination
(C) Gene duplication =＞ speciation
(D) Gene recombination =＞ speciation