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What does it mean to have Neanderthal DNA or Denisovan DNA?
Reviewed by Medicinsk Expert•Last updated: 2026-10-22•Dtcgenetictesting

What does it mean to have Neanderthal DNA or Denisovan DNA?

While many modern humans carry small amounts of DNA from prehistoric ancestors, this genetic material provides limited information and does not indicate current health status or personal traits like intelligence.

Neanderthal DNA and Denisovan DNA in modern humans

Several direct-to-consumer genetic testing companies report how much DNA a person has inherited from prehistoric humans, such as Neanderthals (Homo neanderthalensis) and Denisovans. Direct-to-consumer genetic testing companies generally report this information as a percentage that suggests how much DNA an individual has inherited from these ancestors.

Modern humans can have small amounts of Neanderthal DNA, while Denisovan DNA is rarer:

  • Neanderthal DNA: People from African populations typically have little, if any, Neanderthal DNA, while people with a European or Asian background have about 1 to 2 percent.
  • Denisovan DNA: The percentage is highest in the Pacific Island population of Melanesia (4 to 6 percent) and is lower in other Pacific Islander and Southeast Asian populations. Denisovan DNA is found in very low percentages in populations elsewhere in the world.

Neanderthals and Denisovans

Neanderthals were very early (archaic) humans who lived in Europe and Western Asia from about 400,000 years ago until they became extinct about 40,000 years ago. Denisovans are another population of archaic humans who were distantly related to Neanderthals and lived in Asia. Much less is known about the Denisovans because scientists have uncovered fewer fossils of these ancient people.

The precise way that modern humans, Neanderthals, and Denisovans are related is still being studied. However, research has shown that modern humans first encountered Neanderthal and Denisovan populations about 50,000 years ago, and that they had children together. As a result, many people living today have a small amount of genetic material from these distant ancestors.

The genetic impact of ancient DNA

Direct-to-consumer genetic tests may report on Neanderthal or Denisovan DNA, but the significance of this ancient DNA is still being studied and provides limited information.

Some studies have suggested that certain genetic variations inherited from archaic humans may play roles in hair texture, metabolism, immune responses, adaptations to high altitudes, and other characteristics in modern humans. However, most of the archaic DNA found in modern humans tends to regulate gene activity rather than produce proteins.

While knowing how much DNA a person has in common with their Neanderthal or Denisovan ancestors may be interesting, these data do not provide practical information about a person’s current health. Having DNA in common with archaic humans says nothing about how “evolved” a person is, nor does it give any indication of strength or intelligence. For now, knowing the percentage of DNA a person inherited from Neanderthal or Denisovan ancestors provides only very limited information.

Frequently Asked Questions

Historical evidence shows that modern humans interbred with Denisovans in Southeast Asia and the Pacific. Melanesian populations experienced more extensive admixture, leaving a higher Denisovan genetic signature that persists today.
The small amount of Neanderthal DNA in most non‑African populations is associated with a few traits—such as slightly increased risk for type 2 diabetes or certain immune responses—but the effects are modest and not deterministic. It does not indicate current health status or guarantee any specific trait.
They compare your DNA to reference panels of modern and ancient genomes using single‑nucleotide polymorphisms (SNPs). The algorithm estimates the proportion of your genome that matches archaic sequences, but the result depends on the reference data and can vary between companies.
It can provide a broad sense of geographic ancestry—e.g., a higher Neanderthal percentage suggests European or Asian ancestry, while higher Denisovan DNA points to Pacific Island heritage—but it is only one piece of the puzzle. Combine it with traditional genealogical records and other genetic markers for a fuller picture.===
Source: MedlinePlus, National Library of Medicine

MedlinePlus brings together authoritative health information from the National Library of Medicine (NLM), the National Institutes of Health (NIH), and other government agencies and health-related organizations.

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