Original title: Insights into human evolution from large genetic biobanks
Jeffrey P. Spence, Roshni A. Patel · September 2026
Scientists want to understand how natural selection shapes human genetics. In this paper, researchers review recent work using large genetic biobanks. These biobanks are massive databases that combine detailed health traits with full DNA sequencing. With so many people tested, scientists can track how evolution weeds out harmful changes. They find that nature acts very strongly against loss-of-function mutations, which are broken genes that no longer work. By matching genetic changes to physical traits, researchers also see that stabilizing selection, which keeps traits near an average, plays a major role across multiple traits at once. Ultimately, these evolutionary discoveries help researchers better interpret which genetic differences truly drive human traits, while highlighting questions for future work.
Imagine a recipe book with millions of recipes, each with a few errors. Most errors are harmless, but some make the dish inedible, and over time chefs correct those harmful ones so they become very rare. By counting which errors are rarest, you can tell which ones chefs care about most. In this paper, the recipes are human DNA instructions, the errors are DNA changes, and the chefs are natural selection, with biobanks letting researchers see which changes are so harmful that evolution almost always removes them.
This matters because understanding how natural selection has shaped our DNA helps researchers identify which genetic variants are most likely to cause disease. It also clarifies why some harmful mutations persist in populations, improving the interpretation of genetic tests and medical studies.
This review does not provide new empirical results; it summarizes current knowledge and identifies gaps. The findings discussed are based on existing biobanks, which may have biases in population representation. The paper does not settle debates about the exact strength of selection or the relative importance of different evolutionary forces.
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Insights into human evolution from large genetic biobanks — Jeffrey P. Spence, Roshni A. Patel
Abstract licence: CC0
Explanation generated by Synthesis from the abstract — it is not the original paper. This is a preprint, so it hasn't necessarily been peer reviewed.