New hope for beta males: "Macho gene" discovered

‘New evidence indicates that the SRY gene exerts “maleness” by acting directly on the brain and peripheral tissues to regulate movement and blood pressure in males.

‘In view of this, we propose SRY provides a genetic basis to explain why the “fight flight” response Is manifested mainly in males rather than females.’

Although research into this has mainly been carried out in men – with no direct comparison to stress in women – they believe it could helps psychologists and lead to new treatments for personality disorders.