DNA polymorphism refers to the variations in the DNA sequence among individuals within a population. These variations can occur in the form of single nucleotide polymorphisms (SNPs), insertions, deletions, or larger structural changes. Such differences can influence traits, susceptibility to diseases, and responses to medications. These genetic variations are essential for the study of genetics, evolution, and population biology. They provide insights into how species adapt to their environments and can be used in forensic science and personalized medicine to understand individual genetic profiles and their implications for health.