Genetic variants are differences in the DNA sequence among individuals. These variations can occur in a single nucleotide, known as a single nucleotide polymorphism (SNP), or involve larger segments of DNA. Genetic variants can influence traits, such as eye color or susceptibility to certain diseases, and they play a crucial role in the diversity of living organisms. Some genetic variants are inherited from parents, while others can arise spontaneously. Researchers study these variants to understand their effects on health and development. By examining genetic variants, scientists can identify potential targets for treatments and gain insights into the genetic basis of conditions like cancer or diabetes.