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Genetic Studies Prove Cuckolded Fathers Are Rare In Human Populations

HughPickens.com writes: A common urban myth is that many fathers are cuckolded into raising children that genetically are not their own -- a fear fueled by the paternity tests that have become a standard staple of gossip magazines, talk shows, and TV series. Now, Carl Zimmer reports at the New York Times that our obsession with cuckolded fathers is seriously overblown as a number of recent genetic studies have challenged the notion that mistaken paternity is commonplace. It wasn't until DNA sequencing emerged in the 1990s that paternity tests earned the legal system's confidence. Labs were able to compare DNA markers in children to those of their purported fathers to see if they matched. As the lab tests piled up, researchers collated the results and came to a startling conclusion: 10 percent to 30 percent of the tested men were not the biological fathers of their children. There's only one problem with these previous studies: the results didn't come from a random sample of people. The people who ordered the tests already had reason to doubt paternity.

In a 2013 study, Dr. Maarten H.D. Larmuseau used Belgium's detailed birth records to reconstruct large family genealogies reaching back four centuries. Then the scientists tracked down living male descendants and asked to sequence their Y chromosomes. Y chromosomes are passed down in almost identical form from fathers to sons. Men who are related to the same male ancestor should also share his Y chromosome, providing that some unknown father didn't introduce his own Y [chromosome] somewhere along the way. Comparing the chromosomes of living related men, Larmuseau came up with a cuckoldry rate of less than 1 percent. Similar studies have generally produced the same low results in such countries as Spain, Italy and Germany, as well as agricultural villages in Mali. "The observed low EPP rates challenge the idea that women routinely 'shop around' for good genes by engaging in extra-pair copulations," concludes Larmuseau . "The (potential) genetic benefits of extra-pair children are unlikely to be offset by the (potential) costs of being caught, particularly in such a long-lived species as humans with heavy offspring dependence and massive parental investment."

4 of 282 comments (clear)

  1. No, they have second marriages instead by eggstasy · · Score: 4, Interesting

    They have kids with the high testosterone alpha males, and then some of them go on to do menial work, turn out to be aggressive, or they simply grow tired of each other after some years. But their first choice is usually some animalistic notion of "good genes".
    And then later when they're older and wiser they marry the type of beta male they had friendzoned before, because they're more peaceful, less risk-taking and often smarter and more successul.
    Read: Shadows of Our Forgotten Ancestors, by Carl Sagan and Ann Druyan.

  2. This must be why paternity tests are illegal by DNS-and-BIND · · Score: 1, Interesting

    In many European countries, paternity tests are illegal. Seriously, importing a home paternity test has the same legal status as trying to import opium poppies. Surely if cuckoldry is so rare, then there is no need for these laws.

    Recently, a French journalist was astounded by the fact that in America, paternity testing is 100% safe and 100% legal. He stated that such ideas are inconceivable in France. That puts a whole new twist on the popular American conception of French people as free-spirited and open in every way when it comes to sex and relationships.

    Left unsaid is why a woman would do this to the man she loves. Why would she go outside of her relationship and deliberately allow herself to be impregnated by another man, one she does not love? The whole thing is baffling to educated people. More research is clearly called for...but I bet it won't happen.

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    Shutting down free speech with violence isn't fighting fascism. It IS fascism!
  3. What's going on with these numbers? by guises · · Score: 3, Interesting

    Submitter says cuckoldry is "rare" and "Larmuseau came up with a cuckoldry rate of less than 1 percent," with a link, but if you actually on the link it says 1-2% (from the abstract).

    ::sigh:: I can answer my own question here. In the "results" section it gives, "rate of 0.91% (95% CI: 0.41–1.75%)." Note to submitter: this does not mean less than 1%. This means 1-2%, as given in the abstract. This is part of why abstracts exist - to give results in an unambiguous manner, so that they're not misinterpreted. Maybe it's not a big deal here, but it can be sometimes.

  4. True... by tom229 · · Score: 3, Interesting

    There's some truth to the notion that monogamous species are attracted to two types of mates: alpha, and provider. This is due to monogamy evolving only when two parents are needed to care for the offspring in order for it to survive. There's also evidence that the female in the monogamy will often attempt to be seeded by an alpha in secret. If her provider mate finds out he will abandon the nest. Yes, I'm mostly talking about birds. While humans have evolved monogamy as well, we have this pesky little thing called "a high level of consciousness". This makes it very difficult to throw around generalisations and make assumptions.

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    If it ain't broke, don't fix it.