Polymorphisms refer to genetic variations in an individual's DNA sequence that can affect traits such as disease susceptibility, drug metabolism, and physical characteristics. Numerous synonyms exist for this term, including genetic variation, allelic variation, gene variation, nucleotide variation, and SNP (single nucleotide polymorphism). Other related terms include mutation, genotype, and phenotype. These different terms may be used interchangeably or with slight variations in meaning depending on the context. In the field of genetics, understanding polymorphisms is crucial to personalized medicine and predicting an individual's risk for certain inherited conditions.