In literature”“Pervasive findings of directional selection realize the promise of ancient DNA to illuminate human adaptation” A study called (Joint Findings of Directional Selection, Ancient DNA Promises to Elucidate Human Adaptation) to striking results reaches.

The research examines the human environment using ancient DNA time series data. in adaptation processes The goal is to investigate the effects of natural selection.

First, it is useful to examine the methodology.

Research shows people who have lived in the past 14,000 years 8,433 ancient Western European individuals and 6,510 modern humans This is a large sample group.

In this regard, the genetic data of these people was collected from millions of samples in ancient DNA libraries. single nucleotide polymorphism (SNP), That is, the variation that affects only one of the basic building blocks in a genetic sequence is analyzed.

In this direction, genetic adaptation processes, skin color, body fat percentage, immune system, resistance to infectious diseases and cognitive functions Related genes are examined as part of research.

So what do the findings indicate? As the traits necessary for human adaptation develop, it appears that the dysfunctional traits gradually atrophy.

The results obtained are based on the HLA-DQB1 gene. risk factor for celiac disease shows an increase from about 0% to 20% over the past 4000 years.

Researchers discovered that beginning of agriculture and states that it may be related to the spread of foods containing gluten.

Moreover, in the last 6000 years frequency of blood group B It is stated that this has increased from approximately 0% to 8%.

This means that this increase is under the influence of various pathogens natural selection pressure This shows that it has an effect on blood groups.

Moreover, in the TYK2 gene risk of tuberculosis It is claimed that an allele linked to the disease rose to 9% 3000 years ago and then fell again to 3%.

Researchers have used this finding in diseases such as tuberculosis. changes in selection pressure interprets it as reflective.

According to the research, fat storage trends have decreased over the past 10,000 years!

In scores related to the tendency to store fat over the past 10,000 years a serious decline has reportedly been observed.

For this finding, with the transition to agricultural societies reducing the need for energy storage A comment is made that it may be related.

Moreover, after the start of agriculture, alleles appeared to be present that lead to a lighter skin color. To adapt to lack of sunlight It is known to show selection.

Researchers say this adaptation occurs in low sunlight. Increase vitamin D synthesis He indicates what he has developed for

associated with cognitive performance, scores on intelligence tests, years of education and family income Alleles such as these appear to have shown directional selection over the past 10,000 years.

In other words, this finding shows that the characteristics that are beneficial in modern societies are also offered an adaptive advantage in ancient societies shows that it is possible.

In other words, researchers have shown that these genetic traits, which appear to have adapted to the needs of modern societies, were already present in ancient times. ecological or social benefits claims to provide.

In summary, the results of the research show on a scientific basis how the human genome adapts to ecological and cultural changes.

As a result, this research shows that human genetics not only bears traces of the past, but has also been around for thousands of years. How it adapts to environmental and cultural pressures That also appears.

Of course, as with any scientific study, so does this study There may be some limitations Let us recall that it would be correct to attribute it to the main mass within the scope of its own example and end our content.

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