Dr. Daniel Osei, PhD
Biologist
A research biologist bridging molecular genetics and public-facing science through rigorous, evidence-based tools.
Dr. Daniel Osei is a Senior Research Scientist at the Noguchi Memorial Institute for Medical Research in Accra, where his work centres on the population genetics of infectious disease agents and the genomic surveillance of pathogens endemic to sub-Saharan Africa. Over a 14-year career spanning Cape Town, Accra, and international collaborative networks, he has contributed to more than 40 peer-reviewed publications on topics including antimicrobial resistance gene transfer, malaria parasite genetic diversity, and the application of Hardy-Weinberg equilibrium models to disease-vector populations. His doctoral research at the University of Ghana examined recombination hotspots in Plasmodium falciparum, and that precision-oriented quantitative training has remained the foundation of everything he does.
Beyond the laboratory, Dr. Osei has taught genetics and cell biology at the undergraduate and postgraduate level for a decade, a role that sharpened his ability to translate complex probabilistic and molecular concepts into frameworks that non-specialists can apply correctly. That dual fluency, in rigorous science and in clear communication, is what he brings to the biology and genetics calculators he authors and reviews for OnlyCalculators. He scrutinises each tool against primary literature and standard reference values before endorsement, with particular attention to the assumptions embedded in population-genetics models, microbial growth kinetics, and inheritance probability calculators.
Dr. Osei is a Fellow of the African Academy of Sciences and a Certified Biosafety Professional. He collaborates regularly with the West African Health Organisation on genomic capacity-building initiatives and advises the Ghana Health Service on laboratory biosafety standards. When a calculation touches on Hardy-Weinberg frequencies, bacterial generation times, or Mendelian ratios, users can expect the underlying logic to reflect current consensus in the peer-reviewed literature rather than simplified approximations.
“Every calculator he reviews is held to the same standard as a methods section in a journal submission: the inputs must be clearly defined, the assumptions made explicit, and the output traceable to a primary source.”