The core principle involves characterizing genomic variation through allele frequency distributions and nucleotide diversity to distinguish between neutral evolutionary processes (genetic drift, mutation) and forces such as natural selection. Formally defined concepts include single-nucleotide polymorphisms (SNPs), transitions versus transversions, linkage disequilibrium ($D'$), fixation indices ($F_{ST}$), and specific ratios like $K_a/K_s$ for detecting positive or purifying selection at the codon level. This theoretical framework belongs to population genetics and quantitative genetics, serving as a mechanism to quantify heritability, map disease-associated loci via genome-wide association studies, and identify adaptive evolutionary trajectories by comparing observed genetic patterns against neutral null models.
The core principle involves characterizing genomic variation through allele frequency distributions and nucleotide diversity to distinguish between neutral evolutionary processes (genetic drift, muta…