DNA and protein evolution is the cornerstone of modern biology. In order to form a new integrated theory, the study incorporates many factors: (1) the large-scale random unequal crossover in eukaryote meiosis have fueled spliceosomal introns, which results in that introns are very common in eukaryotes but very less in prokaryotes; (2) DNA evolution proceeds through two ways: C-to-T (caused by DNA methyltransferase, which mainly existed in vertebrates) and A-to-G substitution (which increased linearly with the A/G gradient); (3) the trend of protein evolution is controlled by the ...