As is known, Y-chromosome contains a DNA that makes men and men present in nearly every cell of the body. But some men have the Y-chromosome begins to disappear from the blood cells as they age. Previous studies have shown that these men are more likely to die younger and suffer from a variety of cancers. At present, scientists have also linked the loss of the Y-chromosome with Alzheimer's disease.

Experts say that while the absence of the Y-chromosome has no effect on human virility, this may help explain why men tend to die earlier than women. These findings were obtained in the study of more than 3,200 men aged 37 to 96 years. Tests have shown that the Y-chromosome is missing in the white blood cells in about one out of five men, and the older men were, the more frequent this phenomenon. It was also established that Alzheimer's disease has evolved almost 3 times more common in men who have suffered from the loss of the Y-chromosome.

The researchers explain that, being an important part of the immune system without Y-chromosome white blood cells can not work properly, and it makes the body vulnerable to a variety of ailments, from cancer to dementia.