SCIENTISTS REFINE AGE ' THE MOTHER OF ALL THE PEOPLE '

To such conclusion scientists from the Polish Silesian University of Technology. Their study was based on the statistical method, developed at Rice University (USA). Previous analysis of mitochondrial DNA gave other dates. Most - 140 thousand. years.

Previously, experts have tried to date the approximate lifetime of the progenitor of all people with the latest genetic technologies - for example, by comparing the DNA of random donor.


Defining the differences in genetic characteristics, it is possible to establish the degree of kinship of two individuals. However, the human genome contains over 20 thousand. genes, so the comparison of distant relatives - even when the task sverhmasshtabnaya modern computer technology, emphasizes ' Kompyulenta '.

Then the experts turned to the mitochondria - the organelles of these human cells have their own genome that is inherited only through the maternal line. It has only 37 genes that change is extremely rare.

At the same time, mitochondrial DNA is the ' hypervariable ' site, changing often enough so that it can be used as a molecular clock, making the relationship between the index donor units of time.

Scientists Tira Krzysztof and Marek Kimmel based their analysis on a comparison of ten human genetic models, each of which gives a conversion factor measurement units. In addition, it is necessary to take into account the growth and declining populations, as well as the way the resettlement of groups, tribes and nations. All of this happens by accident, for which the classical deterministic models do not pay any attention. They had to be discarded.

The most appropriate model that can be used to estimate the age of ' Eve ', the authors considered the limit of the theory of the genealogy of branching processes O'Connell.

After that, they calculated the number of generations required to limit distribution of O'Connell was an adequate approximation to the exact distribution. Thus, the received date of commencement of mitochondrial polymorphism of modern man - 200 thousand. years ago.





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