Evolutionary Significance of Conserved Introns
Eukaryotic protein-coding genes are composed of exons (coding regions) and introns (non-coding regions). Which statement best explains the evolutionary significance of the finding that intron positions are highly conserved in homologous genes across different species?
A
Intron-containing genes are more likely to be horizontally transferred
B
Introns are randomly inserted after speciation events
C
Intron patterns reflect convergent evolution to optimize gene expression
D
Intron positions serve as molecular fossils that track evolutionary relationships
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