People not raised by their natural parents very early in life – from birth to the age of weaning – will also have to look elsewhere for the matchmaking.

Studies on mice have shown that newborn mice removed from their parents within 16 hours of birth and placed with and nursed by their adoptive parents selected partners based their mating preferences not on their immune system genes, but on those of the parents who raised them.

Studies have indicated that people with different MHC genes will actually smell better to you than people whose MHC genes are similar to your own.

dna online dating-12

The online services are based on the theory that people are attracted to partners who have different immune systems than their own.

It is believed that this is a function of evolution with babies bred from parents with different immune systems having a wider variety of immune system genes, and therefore, more robust immune systems.

The tube is then sent to a lab, where it is tested for the presence of two genetic markers.

The two markers tested for are the serotonin uptake controller, which is involved in how people handle positive and negative emotions.

The second marker tested for relates to the genes influencing the person's immune system.

According to research by Instant Chemistry, the maker of the testing kits used by Singld Out, there is a strong correlation between people in long-term relationships having different versions of the serotonin genes and different immune systems.

'With online dating, you have socioeconomic factors people try to match on — religion, how much you make,' Ron Gonzalez, co-founder of Instant Chemistry, told USA Today.

'This is another layer on top of that so you can better find matches.'Membership prices for Singld Out are 9 for three months, 9 for six months or 9 for 12 months. However, on the Singld Out Twitter account, promotional codes for per month membership (three months being the minimum, making the actual price 9) are being tweeted daily.

Research shows there is a strong correlation between people in long-term relationships having different versions of the serotonin genes and different immune systems, said Ron Gonzalez, co-founder of Instant Chemistry."With online dating, you have socioeconomic factors people try to match on — religion, how much you make.

This is another layer on top of that so you can better find matches," Gonzalez said.

But the science of using genes to predict long-term compatibility is only in its infancy, said Mike Dougherty, director of education for the American Society of Human Genetics."If this is a marathon, we're still inside the first mile," he said.