The core mechanism governing phenotypic expression is the central dogma of molecular biology, a hierarchical information flow wherein deoxyribonucleic acid (DNA) serves as the static genomic repository encoding genetic instructions. Within this cellular framework, specific DNA sequences are transcribed into ribonucleic acid (RNA), which acts as an intermediate messenger to guide protein synthesis at the ribosome; these synthesized proteins subsequently function as the structural and functional determinants of the observable phenotype. This theory establishes a direct causal link between genotypic code and phenotypic trait, defining phenotype not merely as appearance but as the measurable physical manifestation resulting from macromolecular construction processes.
The core mechanism governing phenotypic expression is the central dogma of molecular biology, a hierarchical information flow wherein deoxyribonucleic acid (DNA) serves as the static genomic reposito…