Russian geneticist B.A. Malyarchuk, Institute of Biological Problems of the North, Far-Eastern Branch, Russian Academy of Sciences, in Magadan, and Polish researcher J.Czarny have ascertained that African women’s contribution into the European genotype is much lower than it could have been expected, taking into consideration the lengthy history of contacts between representatives of different human races. The conclusion was made by the researchers after they had analyzed more than 17 thousand mitochondrial DNA samples from various populations of Europe and their evolutionary relationships.
The mitochondrial DNA sequences of various nations have their own peculiarities. Thus, there exist several mitochondrial DNA variants, which were formed in Africa. As mitochondria are passed on from generation to generation only maternally, their DNA analysis can tell us only about women of the kin.
About 1 percent of Eurasian population possesses mitochondrial DNA, identical or similar to the DNA of African descent. In the south of Europe, African lines of mitochondrial DNA are most frequently found with the Portuguese (5.8 percent), Sicilians and Tuscan, Albanians, Spaniards and Bosnians. Inhabitants of this region, the Pyrenean peninsula in particular, have experienced profound effect from the population of North Africa during their entire history, therefore, the researchers expected to discover in the European Mediterranean ancient and branchy “ family trees” originating from African progenitresses. However, they found nothing of the kind.
Sergey Komarov | alfa
WPI team grows heart tissue on spinach leaves
23.03.2017 | Worcester Polytechnic Institute
Inactivate vaccines faster and more effectively using electron beams
23.03.2017 | Fraunhofer-Institut für Organische Elektronik, Elektronenstrahl- und Plasmatechnik FEP
Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
The results will be published on March 22 in the journal „Astronomy & Astrophysics“.
Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...
Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...
In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...
20.03.2017 | Event News
14.03.2017 | Event News
07.03.2017 | Event News
23.03.2017 | Life Sciences
23.03.2017 | Physics and Astronomy
23.03.2017 | Physics and Astronomy