For many Nigerians, DNA is something they hear about only in crime movies or paternity disputes.

Yet DNA is much more than that. It is a remarkable scientific tool that can help solve crimes, identify victims of disasters, reconnect missing families, and even tell the story of our shared ancestry.

Over the past few years, I undertook an extensive forensic genetics study involving Nigeria’s three major ethnic groups—Igbo, Yoruba, and Hausa-Fulani. The research was designed primarily to strengthen forensic science in Nigeria, but along the way it also answered several long-standing questions about our population, our ancestry, and our readiness for a national forensic DNA database.

The findings demonstrate that science can provide answers where speculation, assumptions, and myths have often dominated public discussion.

Understanding DNA Beyond Paternity Tests

Every human being inherits DNA from both parents. Although more than 99 per cent of human DNA is shared, the small differences that remain are enough to distinguish one individual from another.

This is why forensic scientists often describe DNA as a biological fingerprint.

Unlike ordinary fingerprints, DNA can be recovered from blood, saliva, semen, hair roots, skin cells, bones, and other biological material. When properly collected and analysed, these samples allow investigators to identify individuals with an exceptionally high level of accuracy.

Forensic DNA technology has transformed criminal investigations worldwide. It has helped identify serial offenders, solve decades-old crimes, exonerate innocent people who were wrongly convicted, and identify victims following natural disasters, terrorist attacks, and major accidents.

Unfortunately, Nigeria has not yet fully embraced this scientific capability.

Why Study Nigerian DNA?

Modern forensic science depends on population-specific research. DNA technologies developed in Europe or North America cannot be assumed to perform identically across all populations. Countries need their own genetic reference data to ensure that forensic evidence is interpreted accurately and fairly.

Before this research, comprehensive forensic genetic data on Nigeria’s major ethnic groups remained limited despite Nigeria being Africa’s most populous nation.

This knowledge gap prompted my doctoral research.

Blood samples were collected from more than 300 unrelated volunteers representing the Igbo, Yoruba, and Hausa-Fulani populations. Advanced forensic DNA technologies commonly used within the United Kingdom were then used to analyse the samples using internationally accepted forensic genetic methods.

The objective was straightforward: to determine whether Nigeria possesses the scientific foundation required for modern forensic DNA applications.

One Country, One Forensic DNA System

Nigeria is home to hundreds of ethnic groups, each with its own history, language, and cultural identity.

Naturally, some people have wondered whether such diversity would make it difficult to establish a single national forensic DNA database.

The results provide reassuring evidence.

From a forensic perspective, the Igbo, Yoruba, and Hausa-Fulani populations are genetically very similar. Standard forensic DNA markers showed no major differences that would prevent one national system from serving all three populations effectively.

This finding is particularly important because it demonstrates that Nigeria’s ethnic diversity is not a scientific obstacle to implementing a national DNA database.

Rather than requiring separate systems for different ethnic groups, one carefully managed national database could provide equitable forensic support across the country.

Choosing Technology That Works Best for Nigeria

An important part of the research compared two forensic DNA systems currently used in the United Kingdom.

Both technologies performed exceptionally well and produced highly reliable DNA profiles. However, one system analysed more genetic markers than the other and consistently generated stronger discriminatory power and greater statistical confidence for Nigerian samples.

This has important implications for policymakers.

As Nigeria develops its forensic infrastructure, it has the opportunity to adopt the most advanced and effective technology available rather than investing in systems that may become out-dated.

Good scientific planning today will reduce costs and improve investigative capability for many years to come.

What Our DNA Says About Our Ancestry

The study also explored paternal ancestry by examining Y-chromosome DNA, which is inherited from father to son.

The findings revealed interesting historical relationships.

The Igbo and Yoruba populations showed evidence of closer paternal ancestry, while some Hausa-Fulani groups displayed signs of historical genetic admixture, reflecting centuries of interaction with neighbouring populations.

The research also found that Fulani populations share genetic links with populations in parts of West Africa, particularly Senegal. These findings support historical accounts describing migration and interaction across West Africa over many centuries.

These discoveries illustrate how genetics can complement archaeology, linguistics, and recorded history in reconstructing human migration.

Science does not replace history; it strengthens our understanding of it.

Revisiting Long-Standing Historical Claims

One of the most widely discussed historical claims involving Nigerian ancestry concerns the belief held by some that the Igbo are descendants of one of the Lost Tribes of Israel.

This subject has generated considerable interest for many decades.

Using internationally recognised forensic genetic methods, the study examined available comparative population data to determine whether a strong genetic relationship exists.

The results did not identify a close genetic connection between the Igbo population and Israeli populations. While questions of culture, religion, and identity extend beyond genetics alone, the available scientific evidence from this study does not support a direct genetic relationship.

Science helps distinguish historical evidence from longstanding assumptions.

Nigerian DNA in a Global Context

The research extended well beyond Nigeria.

DNA data from thousands of individuals across Africa, Europe, Asia, and the Americas were analysed to understand where Nigerian populations fit within the broader human family.

The results confirmed that Nigerian populations are genetically closest to other West African populations, reflecting shared regional ancestry.

The analyses also demonstrated that populations of African descent in North America, South America, and the Caribbean retain strong genetic connections with West Africa despite centuries of separation following the transatlantic slave trade.

This finding reinforces the historical significance of West Africa as an ancestral homeland for millions of people living throughout the African diaspora.

Science in Service of Justice

Although the ancestry findings are fascinating, the primary purpose of this research remains forensic science.

DNA technology is not simply about understanding where we came from.

It is about protecting people today.

A properly managed national forensic DNA database could help investigators identify offenders more quickly, connect crimes committed in different parts of the country, identify disaster victims, locate missing persons, prevent wrongful convictions, and strengthen confidence in Nigeria’s criminal justice system.

Scientific evidence is impartial.

Unlike eyewitness testimony, DNA cannot be influenced by fear, emotion, prejudice, or financial inducement.

It speaks only through biological evidence. Building Nigeria’s Forensic Future

Scientific discoveries alone cannot transform a justice system.

They must be supported by investment, legislation, education, and institutional commitment.

Nigeria needs more forensic laboratories, better-equipped crime scene investigators, continuous professional training, internationally recognised quality standards, and stronger legal frameworks governing DNA collection, storage, and privacy.

The country also requires a national Disaster Victim Identification programme to ensure that victims of plane crashes, terrorist attacks, explosions, floods, building collapses, and other mass casualty incidents can be identified with dignity and accuracy.

These are not merely scientific ambitions.

They are humanitarian responsibilities.

Looking Ahead

Forensic genetics has moved beyond the research laboratory.

It is now one of the most powerful tools available for delivering justice, strengthening national security, and advancing scientific knowledge.

My research demonstrates that Nigeria possesses both the scientific evidence and the technical foundation needed to embrace this technology responsibly.

The country’s remarkable ethnic diversity should be celebrated, not viewed as an obstacle.

The science shows that while our languages, cultures, and traditions may differ, our shared genetic heritage provides a strong foundation for a unified forensic system that serves every Nigerian equally.

The future of forensic science in Nigeria will not be determined solely by advances in technology.

It will be determined by our willingness to invest in evidence, trust science, and build institutions that deliver justice through knowledge rather than speculation.

If we make those investments today, future generations will inherit a criminal justice system that is faster, fairer, and better equipped to protect every citizen.

That is the promise—and the responsibility—of modern forensic science. (This Day)

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