New Genetic Analysis Men are Probably Not Yet Extinct

Men die, but probably not: for it the specific Y chromosome is a genetic analysis, but based on not slowly – as previously suggested by some experts.In fact, it was in the ancestors of the people in the million years of evolution on several occasions been a rapid loss of genes on the chromosome, U.S. researchers writing in the journal “Nature”. In the past 25 million years ago but it is to any significant loss stopped coming.

Humans have 46 chromosomes in the nuclei of almost all of its cells. 44 of these chromosomes both appear as a pair, the other two are the sex chromosomes X and Y. Women have two X chromosomes, males have one X and one Y chromosome.

Men are different disease – and women

About half of all men is 40 years of “erectile dysfunction” affects, popularly known as erectile dysfunction. The causes can be both physical, as well as his mental nature. Or repair – - Accordingly, the potency drug Viagra is not always known for the treatment is appropriate.

While others sweat in summer, women suffer particularly in the so-called menopausal hot flashes often. A cold foot bath is usually no remedy – often is taking the hormones einizige solution.

Like many other men also former U.S. Secretary of State Colin Powell was diagnosed with prostate cancer and underwent surgery 2003rd Prostate cancer is the most common cancer in men. Until now discover they are most common in over 70 years, since more and more young men to the screening, the average age decreases steadily, however. The cure is more likely, the smaller the tumor is still.

In other words: The Y chromosome is found only in men, it carries many genes that are responsible for the development of male characteristics. The Y chromosome is thus the only one in the genome, which has no equivalent counterpart. Genes that lie on the Y chromosome and are lost, are lost.

Researchers say the sex chromosomes from 200 to 300 million years are the result of “normal” chromosomes. Five times since it came to massive transformations of the Y chromosome, which were associated with a gene loss.

Jennifer Hughes of the Massachusetts Institute of Technology (Cambridge / U.S. state of Massachusetts) and her staff now sequenced the Y chromosome of rhesus monkeys, or more precisely the region where the genes responsible for male characteristics are, called MSY. They then compared the results with the already available data on humans and the chimpanzee.

By comparing the Y-chromosomes, the researchers could reconstruct its development. For while the joint development of humans and chimpanzees until about 6 million years ago, ended their separate lineages of Old World monkeys – including the rhesus monkey – and the people already about 30 million years ago.

It turned out that it was in the past 25 million years ago when people only to a gene loss in the region, which was recently remodeled, so-called fifth stratum This region accounts for only three percent of the “male-specific” MSY region.

Strata 1 to 4 had stabilized after a rapid initial Gensch wound already, before the human lineage diverged from rhesus monkeys.