試題詳解

71. The following table compares the % sequence homology of four different parts (two introns and two exons) of a gene that is found in five different eukaryotic species. The data reported for species A were obtained by comparing DNA from one member of species A to another member of species A. Which of these four gene parts should allow the construction of the most accurate phylogenetic tree, assuming that this is the only part of the gene that has acted as a reliable molecular clock?
(A) Exon I
(B) Exon V
(C) Intron I
(D) Intron VI
(E) Both Exon I and V