Date: 4 weeks ago   Category: Health

Researchers have shed light on evolution of a human look


Staff of Université libre de Bruxelles in the person of professor Pierre Vanderkhaguen has found out: increase in a brain of the person can be explained with a mutation of the genes activated at a stage of pre-natal development, Pravda.ru tells. Scientists have tried to find genes which people have, but isn't present at animals.

came To the forefront NOTCH2NL gene. It is known: animals have "ancestors" of modern NOTCH. They regulates amount of neurons of a brain. Probably, at some point ancestors of modern people had had a failure - the gene of NOTCH was duplicated. Later, 3 million years ago, Australopithecuses had had one more wrong duplication of a fragment of DNA and there was NOTCH2NL. he has led

to sharp increase in number of neurons, to change of the part of a brain controlling the speech, figurative thinking and creativity. However, scientists recognize: three million years aren't enough that these genetic schemes worked without problems. In particular, because of them the mikrotsefaliya (reduction of the sizes of a skull and brain) and a makrotsefaliya (increase), schizophrenia and autism develops.

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