Why women live longer? Fruit flies offer DNA clue.
A group of scientists believe they have discovered a clue to why women tend to live longer than men by studying fruit flies.
Published in Current Biology, the study focuses on mutations in mitochondrial DNA – the power source of cells.
Mitochondria are inherited only from mothers, never from fathers, so there is no way to weed out mutations that damage a male’s prospects.
But one ageing expert said there were many factors that explained the gender difference in life expectancy.
And females outlive males in many other species.
Scientists believe they have discovered a clue to why women tend to live longer than men by studying fruit flies
In the research, experts from Australia’s Monash University and the UK’s Lancaster University analyzed the mitochondria of 13 different groups of male and female fruit flies.
Mitochondria, which exist in almost all animal cells, convert food into the energy that powers the body.
Dr. Damian Dowling, of Monash University who was one of the researchers, said the results point to numerous mutations within mitochondrial DNA that affect how long males live, and the speed at which they age.
“Intriguingly, these same mutations have no effects on patterns of ageing in females,” he said.
“All animals possess mitochondria, and the tendency for females to outlive males is common to many different species.
“Our results therefore suggest that the mitochondrial mutations we have uncovered will generally cause faster male ageing across the animal kingdom.”
They suggest this is because there is no evolutionary reason for the faults that affect males to be picked up – because mitochondria are passed down by females.
Dr. Damian Dowling added: “If a mitochondrial mutation occurs that harms fathers, but has no effect on mothers, this mutation will slip through the gaze of natural selection, unnoticed.
“Over thousands of generations, many such mutations have accumulated that harm only males, while leaving females unscathed.”
Related search articles:- old woman young without dress
- women bound with scarves
- britney spears skirt flies up
- females-smoking -120s
- a person with one eye
- Saudi maruna Rishana
- seriously women upskirt
- shooting cum on unknowing women
- what is kraft food group business architecture
- woman fondling baby boys
- WWW GIRLS WTH ENEMLS XNX
- nanga desi still image of woemn
- moroko mujra
- aged woman tgp
- biome for shih tzu dog
- caroline wozniacki hairy legs
- chines vitname xnxx com
- cloths that glow when woman is turn on
- female beef tgp
- free pictures women wearing playboy jeans
- live dog faking
- you tube iron man female fitness models
Male fruit flies rejected by females drink more alcohol, say scientists 
Why women live longer than men? Eunuchs reveal clues to old age. 
Men will soon outliving women for the first time as they ditch bad habits 
Starvation diet could actually be good for your health and makes you live longer 
Fasting on and off can make you live longer 
DNA reveals how long you will live 
Filling up with fruit and vegetables at meal times won’t trick you into eating lessShort URL: http://www.bellenews.com/?p=22247
