Reasons why women live longer then men

Reasons why women live longer then men
It is an accepted fact of life that men enjoy certain physical advantages over women. Men are stronger, taller, faster and less likely to be overweight, but they have then tendency to die before their female counterparts. Their date rate is higher than women in many different societies. Women, as a group, live longer than men. In all developed countries and most undeveloped ones, women outlive men, sometimes by a margin of as much as 10 years. In the U.S., life expectancy at birth is about 79 years for women and about 72 years for men. The gender discrepancy is most pronounced in the very old: among centenarians worldwide, women outnumber men nine to one. The gender gap has widened in this century as…show more content…
Chromosomal differences between men and women may also affect their mortality rates due to diseases. Chromosomes carry genetic mutations that cause a number of life-threatening diseases, including muscular dystrophy and hemophilia. Because women have two X chromosomes, a female with an abnormal gene on one of her X chromosomes can use the normal gene on the other and thereby avoid the expression of disease even though she is still a carrier of the defect. Men, in contrast, have one X chromosome and one Y chromosome, and so they cannot rely on an alternative chromosome if a gene on one of the sex chromosomes is defective. If a man has a defect in this gene, his body’s ability to repair the mutations that arise during cell division could be severely compromised. The accumulation of such mutations is thought to contribute to aging and disease. The second X chromosome as a longevity factor in and of itself. Although one of the two Xs is randomly inactivated early in life, the second X seems to become more active with increasing age. It may be that genes on the second X activates and compensate for genes on the first X that have been lost or damaged with age.
A third reason for the mortality rate be higher for males is the fact that men are more likely to engage in risky life-threatening behavior thus raising the mortality rate among them. While this is a more social reasoning it can be explained using biological terms. The male specie
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