Where is most human genetic variation found?
Quick Answer
Most human genetic variation is found in the DNA sequences that differ from person to person across the genome. Many differences are in noncoding regions rather than in genes that make proteins.
The Full Story
Human genetic variation is spread across the genome, but a large share of it lies outside protein-coding genes. These differences include single-nucleotide variants, small insertions and deletions, and larger structural changes. Variation can affect traits, disease risk, and ancestry patterns, though many differences have no obvious effect. Genomics studies compare variation across populations to understand human history and health.
Key Facts
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"Most of what makes us genetically different is hidden outside the famous genes."
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