Home » News » Mate Selection May Be Influenced by Genetics

Mate Selection May Be Influenced by Genetics

Mate Selection May Be Influenced by GeneticsA provocative new study finds that individuals are more genetically similar to their spouses than they are to randomly selected individuals from the same population.

While the finding does not go to the extreme as to suggest a desire for a superior race, researchers from University of Colorado, Boulder acknowledge that prior research has shown that people tend to marry others who have similar characteristics.

Commonalities with a spouse often include religion, age, race, income, body type, and education, among others.

In the new study, published in the journal Proceedings of the National Academy of Sciences, scientists show that people also are more likely to pick mates who have similar DNA.

While characteristics such as race, body type, and even education have genetic components, this is the first study to look at similarities across the entire genome.

“It’s well known that people marry folks who are like them,” said Benjamin Domingue, Ph.D., lead author of the paper. “But there’s been a question about whether we mate at random with respect to genetics.”

For the study, Domingue and his colleagues, including Jason Boardman, Ph.D., used genomic data collected by the Health and Retirement Study, which is sponsored by the National Institute on Aging.

The researchers examined the genomes of 825 non-Hispanic white American couples. They looked specifically at single-nucleotide polymorphisms, which are places in their DNA that are known to commonly differ among humans.

The researchers found that there were fewer differences in the DNA between married people than between two randomly selected individuals. In all, the researchers estimated genetic similarity between individuals using 1.7 million single-nucleotide polymorphisms in each person’s genome.

The researchers compared the magnitude of the genetic similarity between married people to the magnitude of the better-studied phenomenon of people with similar educations marrying, known as educational assortative mating.

They found that the preference for a genetically similar spouse, known as genetic assortative mating, is about a third of the strength of educational assortative mating.

The findings could have implications for statistical models now used by scientists to understand genetic differences between human populations because such models often assume random mating.

The study also forms a foundation for future research that could explore whether similar results are found between married people of other races, whether people also choose genetically similar friends, and whether there are instances when people prefer mates whose DNA is actually more different rather than more similar.

Source: University of Colorado, Boulder

Mate Selection May Be Influenced by Genetics

Rick Nauert PhD

Rick Nauert, PhDDr. Rick Nauert has over 25 years experience in clinical, administrative and academic healthcare. He is currently an associate professor for Rocky Mountain University of Health Professionals doctoral program in health promotion and wellness. Dr. Nauert began his career as a clinical physical therapist and served as a regional manager for a publicly traded multidisciplinary rehabilitation agency for 12 years. He has masters degrees in health-fitness management and healthcare administration and a doctoral degree from The University of Texas at Austin focused on health care informatics, health administration, health education and health policy. His research efforts included the area of telehealth with a specialty in disease management.

APA Reference
Nauert PhD, R. (2015). Mate Selection May Be Influenced by Genetics. Psych Central. Retrieved on June 18, 2018, from https://psychcentral.com/news/2014/05/23/mate-selection-may-be-influenced-by-genetics/70268.html

 

Scientifically Reviewed
Last updated: 6 Oct 2015
Last reviewed: By John M. Grohol, Psy.D. on 6 Oct 2015
Published on PsychCentral.com. All rights reserved.