Human Genome Variation

Human genome variation refers to the differences in DNA sequences among individuals, which contribute to our unique traits, health, and susceptibility to certain diseases. These variations can include small changes like single nucleotide differences (single nucleotide polymorphisms or SNPs) or larger alterations such as insertions, deletions, or structural changes. Understanding these variations helps scientists identify genetic factors linked to health conditions and personalize medicine. While all humans share over 99% of their DNA, these slight differences are key to individual diversity and biological functioning.