Study has found 1,000 genes that are more active in one gender than the other

Probed parts of mouse brains that program 'rating, dating, mating and hating'

Some of the genes are risk factors for brain disorders more common in one sex

Experts said the differences are likely reflected in the brains of men and women

It's often said that men and women's brains work so differently that one sex is from Venus and the other is from Mars.

Well now a new study supports this hypothesis after finding 1,000 genes that are much more active in one gender than the other.

It looked into how male and female mouse brains differ by probing areas that are known to program 'rating, dating, mating and hating' behaviours. 

The behaviours — for example, male mice's quick determination of a stranger's sex, females' receptivity to mating, and maternal protectiveness — help the animals reproduce and their offspring survive.

These differences are also likely reflected in the brains of men and women, the researchers from Stanford Medicine said.