Scientists believe the Y-chromosome is defective. It is smaller than all the others, is not so much information. In the evolution of this genetic structure degrades and loses genes. It is quite possible that in the distant future, the chromosome will disappear.
However, this opinion is completely refuted group of researchers. Information published in Nature. Scientists have shown that the Y chromosome is very important. In many ways it defines the high survival rate of men. A large number of genes men want not only to maintain reproductive function, but also for other signs.
In particular speaks of the increased resistance of men to diseases of various kinds. In the nearest plans of the scientists drafting biochemical catalog differences between male and female combinations of genes (XY and XX). This analysis will help in the evaluation of gene expression and production of proteins in the two sexes.