We have been using DNA testing in the genealogical community now for a number of years. We have made great strides in breaking down brick walls, first using y-DNA and mtDNA, and now using autosomal DNA. It has also been used to help us with our family medical health history. But now DNA has new uses.
Toronto-based Instant Chemistry has done research to show that there is a biological as well as psychological component to human relationships. It appears that DNA has been influencing our love lives all along.
Studies have shown that couples in long-term relationships often have very different immune systems from each other. They find each other more attractive, enjoy more satisfying sex lives, have increased fertility rates, and have greater marital stability. Children of these relationships are able to more successfully defend against a wider variety of infections.
It is the genes that comprise the immune system that are responsible for this. More specifically, it is the genes that are part of the Human Leukocyte Antigen (HLA) system. These are the genes responsible for identifying foreign bodies that can cause infections and other problems. They also contribute to the natural body scent that is unique to each of us. Research shows that we can subconsciously detect these scents, and they are responsible for our attraction to each other and choosing our partners.
Genetics can also now assist in predicting potential problems the might develop in relationships. For example, the serotonin transporter gene is responsible for moderating positive and negative emotional behavior. Short versions, for example, can mean higher negative and lower positive emotional behavior and declines in marital satisfaction over time. Knowing this in advance, couples can get counseling to obtain tools to overcome these potential issues.
Instant Chemistry will do genetic testing to help determine how your genes might influence your relationship. You and partner do the familiar spit test, and the company will evaluate you and inform you of any potential issues. The company has also partnered with matchmakers and online dating services to offer the testing in advance, to help match you with someone who may be more compatible genetically. Currently the test is only available for heterosexual couples, but they are currently testing gay and lesbian spouses to determine if the science is true for same-sex relationships as well.
Discovering this makes me wonder if there could be genealogical applications for this technology. Could the tests be done on our ancestors? Could we find out more information about their relationships? This could potentially shed new light onto our ancestral families.