This study truly proves that birds of a feather flock together. Behavioural scientists found husbands and wives had more DNA in common than strangers.

Research from the University of California shows we still get attracted to spouses whose genes are similar to our own. Lead researcher Benjamin Domingue thinks people genetically similar to us have more opportunities to meet and mate.

Domingue and his colleagues evaluated the genetics of 825 white heterosexual American married couples. They were compared with 1.7 potential points of genetic similarity. Researchers noticed spouses to be sharing a large number of genetic similarities when compared to two random individuals.

But it shall be noted that similarity between siblings still remains higher than between married folks. Domingue explained on an average, siblings share around 50% of their genes. Even within them, variation could be between 40% and 60%.

"The ranges we're looking at between married couples are much, much smaller, but you do see that spouses share similarities", said Domingue. There is a possibility that married couples likely having similar genetic traits as their genes helped them determine who they would meet during their lives.

It has been noticed that people having more similar genes also have similar level of education. It helps them to be in a social circle where chances of meeting each other increase. Domingue added by saying people also marry those who are similar to them in terms of race, ethnicity and body size and shape.

There is an expert who is a bit skeptical about the researchers' conclusions. As per Neil Risch, director of the Center for Human Genetics at the University of California, the study seems to suggest that mate choice is based on genes. The genes are a bystander. For him, marrying people having similar taste could be more an issue of local geography.