Because the sequence dictates which codons are present, it directly determines the exact chain of amino acids that will be produced, defining the primary structure of the protein. This specific arrangement of nucleotides—adenine, thymine, cytosine, and guanine—encodes the instructions used in the development and functioning of every known living organism.
How Base Pair Sequence Dictates Heredity and Phenotypic Traits
Regulatory Elements and Gene Expression Beyond coding for proteins, the sequence of base pairs also determines the location and function of regulatory elements. Evolutionary Adaptation and Mutation Over time, the sequence of base pairs changes through mutations, which is the raw material for evolution.
During protein synthesis, the sequence is transcribed into messenger RNA and then translated into a polypeptide chain. Impact on Phenotypic Traits While the connection between genotype and phenotype is complex, the sequence of base pairs provides the foundational template for observable traits.
How Base Pair Sequence Determines Heredity and Phenotypic Traits
Natural selection acts on the variations introduced by these changes in the DNA sequence. Certain mutations in the base pair sequence can disrupt normal protein function, leading to genetic disorders.
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