People tend to choose partners with similar DNA
There's more science to suggest that opposites, in fact, don't attract. A new study published in Proceedings of the National Academy of Sciences concludes that people tend to to be drawn to people very much like themselves, right dow to their DNA.
Researchers from the University of Colorado Boulder analyzed the genomes of 825 non-Hispanic American married couples to look at their single-nucleotide polymorphisms (SNPs), a part of DNA that is usually unique to each person. The research team compared 1.7 million SNPs among these married couples compared to unmarried pairs of people. The married couples were taken from the University of Michigan Health and Retirement Study, a longitudinal study that surveys over 26,000 people over 50 years old every two years.
Overall, the findings showed less DNA differences in married couples compared to the pairs not in a relationship. They also compared DNA of couples with similar education levels, known as educational assortative mating. The educational matchup was much stronger than people who seek partners with similar DNA, which was only about one-third the prevalence as the educational assortative mating.
These results may help scientists who use statistical models to analyze human populations.