Why females have a tendancy to live longer than males: May be due to the father's sperm

Researchers in Japan have uncovered that female mice produced by using genetic material from two mothers but no father live significantly longer than mice with the normal mix of maternal and paternal genes. Their findings provide the first evidence that sperm genes may have a detrimental effect on lifespan in mammals.Mice created from two female genomes lived an average of 186 days longer than control mice created from the normal combination of a male and female genome. The average lifespan for the type of mice used in the study is between about 600-700 days, meaning that the BM mice lived approximately a third longer than normal. The study may give an answer to the fundamental questions, such as whether longevity in mammals is controlled by the genome composition of only one or both parents, and just maybe, why women are at an advantage over men with regard to the lifespan.