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Red Hair Genes on the Rise, Study Finds
16 Apr
Summary
- Ancient DNA reveals natural selection's impact on human evolution.
- Genes for red hair, celiac disease, and lighter skin are increasing.
- Study also notes increased immunity and lower disease risks.
New analysis of ancient DNA from nearly 16,000 individuals across West Eurasia over 10,000 years has unveiled the profound impact of natural selection on human genomes. Researchers utilized advanced technology to track allele frequency changes over time.
This evolution shows a notable increase in genes linked to red hair, coeliac disease, and lighter skin tones. While the rise of red hair may not have been historically vital, it occurred alongside more significant evolutionary shifts.
The study, involving over 250 collaborators, added extensive new DNA data, significantly expanding the available ancient human genetic literature. This allows for a more real-time understanding of how selection shapes biology.
Beyond hair color and skin tone, the research identified traits associated with enhanced immunity, such as HIV resistance and leprosy resistance. It also indicated a lower risk for rheumatoid arthritis, alcoholism, bipolar disorder, schizophrenia, and reduced susceptibility to smoking.
Furthermore, genetic changes appear to have led to lower body fat percentages, waist-to-hip ratios, and body mass indexes. These findings could revolutionize genetic research into health and disease, improving disease risk assessments and treatment development.
