This page discusses how DNA transmits genetic information reliably but can undergo mutations, affecting phenotype and leading to classification into mutants. It differentiates between mutations and po...This page discusses how DNA transmits genetic information reliably but can undergo mutations, affecting phenotype and leading to classification into mutants. It differentiates between mutations and polymorphisms, noting that polymorphisms are common variants (over 1%) that do not imply normality. While mutations may cause diseases, polymorphisms can account for traits like hair color. Molecular markers, a specific type of polymorphism, are important for genetic research.