Scientists predict that women live longer because it has a key part of their cells are less harmful defects. They found that errors in the "engine" of every cell in males much larger effect. The reason why is that women inherit DNA from the mother, while the separated mutations that are harmful only to them. Mutations that are harmful to men, to be lost and thus over time slow to threaten the health of cells.
"The children receive a majority of the genes from mothers and fathers, but receive only mitochondrial DNA from their mother," says Australian scientist Damian Dowling. "This means that the evolutionary process of quality control, better known as natural selection, only verifies the quality of maternal mitochondrial genes. If there is a mutation of mitochondrial DNA, affecting the father's genes, but not mothers, the mutation slipped unnoticed past natural selection," says and adds that both men harmful mutations accumulate over thousands of generations.
"Our research suggests that mitochondrial genomes are also hot spots of mutations that affect men's health. Now seeks to explore the genetic mechanisms that could help men izničevanju harmful effect of these mutations and the maintenance of health," he says.
Perú, 06.08.2012.
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