Genetic evidence refers to information derived from an organism's DNA that can be used to support conclusions about its ancestry, traits, or evolutionary history. This type of evidence is crucial in fields like forensic science, where DNA samples can identify individuals, and in evolutionary biology, where genetic similarities help trace the lineage of species. Researchers analyze genetic sequences to find variations and mutations that can indicate relationships between different organisms. For example, comparing the genomes of humans and chimpanzees reveals shared ancestry, while studying genetic markers can help track inherited diseases within families.