This page discusses the similarities and differences in the genomic DNA sequences of two individuals, noting that while many variations occur in non-coding regions and may not have a functional impact...This page discusses the similarities and differences in the genomic DNA sequences of two individuals, noting that while many variations occur in non-coding regions and may not have a functional impact, they are valuable as molecular markers. These markers play important roles in medicine, forensics, and agriculture, allowing for the creation of genetic maps and the identification of linked genes.