Understanding SNPs: How Single Nucleotide Polymorphisms Cause Genetic Variation #3701618 (License: Personal Use)

This diagram illustrates a single nucleotide polymorphism (SNP), the most common type of genetic variation, where a single DNA base differs between individuals-in this case, T (maternal) vs. A (paternal) at a specific locus. The resulting genotype combinations (AA, AT, TT) reflect inheritance patterns and can impact phenotypic expression, disease susceptibility, or drug response. Such variations are foundational in genome-wide association studies (GWAS) and personalized medicine.

Used in educational biology resources, genetics textbooks, medical informatics sites, and bioinformatics tutorials to explain inheritance and variation; targets students, researchers, and health-conscious users seeking to understand genetic testing results or ancestry reports.