After over 400 million An analysis of people's life expectancy has highlighted the fact that the influence of genes on age is significantly lower than the previously calculated coefficient. The initiators of the study believe that without heredity or the value of the living environment there is another factor that is not yet widely discussed, writes sciencealert.com.
What is the determining factor of life expectancy? Oggi choice. When choosing similar partners and partners, it turns out that we are transferring the cultural and genetic particularities associated with life expectancy, such as the transfer of property owned by us or the social and economic status.
"Human genes say a lot about the biological processes associated with aging, but life's inheritance is not so significant," says Graham Ruby, who led the study.
Explaining how traits travel through generations, scientists determine heredity. This measure also indicates how property is transmitted, such as life expectancy, changes over time and affects both genetic and non-genetic differences. The latter may include lifestyle, socio-cultural context, unforeseen circumstances, etc.
The results of previous studies indicate that a person's life expectancy is 15-30%. heredity is determined, but the authors of the new study using Ancestry, an online source of genetic data, claim that this factor is far too high.
"The parent managed to conduct a more detailed analysis because we were able to use a larger set of data. The authors of previous studies did not have such opportunities," says one of the participants in the study group.
To analyze data as close as possible, researchers have chosen a number of relatives and paid special attention to the 400 million people. people born in the 19th-20th centuries All have a relationship between parents and children or spouses.
By developing a data-based model, the researchers noticed unusual and unregistered regularity. It turns out that the spouses' life is remarkably similar – more than the siblings and sisters whose genetic patrimony is much more similar.
Yes, of course, it may be because husbands live in the same environment. However, some data are driven by another reason.
It was found that chickens (brothers and sisters of spouses) and first-line cousins and cousins of spouses, though not associated with blood and also not living in the same environment, also survive a similar number of years.
Beginning to study the lives of other distant relatives such as uncle, aunt and cousins of the first line and half of the sisters, the researchers observed the same regularity, which contradicts the conclusion that the life expectancy on both sides of the herd is similar.
Thus, the data showed that, in addition to genetics and the common living environment, there is also a third factor that determines the life span – the partnership of similar persons. This is a case where a fairly large number of options for a partner is similar to that of a voter.
"The partnership of similar people in this regard is important because the characteristics that link partners are factors that determine longevity (or vice versa)," says Ruby.
In no way does it mean that people are rewarded with a sixth sensation that allows them to know in advance how many years their partners will live.
However, according to scientists, people are really reluctant to choose their own partners, and this similarity is usually both genetic and socio-cultural, and learning factors, as news, are inseparable from longevity.
Simply because, for example, rich life leads to longevity, while rich people seek to marry less prosperous people, the life of wealthy family members is automatically similar.
The same applies to genetic properties. So if the tall people choose big wives and the height affects life expectancy, they will be able to see the same regularity.
Regarding the importance of similar partnerships, researchers have spent 7% on life expectancy. which represents half what was believed to be so far.
Therefore, the longevity of the genes, apparently, is not as common as we imagined.
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