By Tamara Cohen

Last updated at 12:49 AM on 8th March 2012

Scientists believe they have found the macho gene which makes men behave more aggressively than women under stress.

They say this one gene could explain why men have a fight or flight response while women are more likely to try and defuse the situation, a response known as tend and befriend.

Australian researchers have studied the chemicals secreted by men when they react to stress and how this influences their behaviour.

Rage against the machine: Anger in men is the fault of the SRY gene, say researchers (file picture)

And they propose that the SRY gene only found on the Y chromosome and the proteins it activates in the body, are the key.

This gene was previously thought just to be involved in the development of male characteristics in the womb.

Good spread: The SRY proteins were found all over the body

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The 'macho' gene that makes men aggressive has been found

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