DNA markers are specific sequences in the DNA that can be used to identify genetic variations among individuals. These markers can be found in non-coding regions of the genome and are often used in genetic studies, breeding programs, and forensic analysis. They help researchers track inheritance patterns and understand genetic diversity. There are different types of DNA markers, including microsatellites, single nucleotide polymorphisms (SNPs), and restriction fragment length polymorphisms (RFLPs). Each type has its own advantages and applications, making them valuable tools in fields like genetics, evolutionary biology, and medicine.