The University of Utah’s Genetic Science Learning Center is following a trail of hints that now lead them to believe that most of the common behavior traits and physical anomalies we notice are purely genetic.
That is, the researchers report that such common behavior as rolling ones tongue is coded in Adenine, Cytosine, Guanine and Tyrocene. The acids A, C, G and T are the building blocks of life, wound around the double helix DNA molecule powering every living being on Earth, from bacterium to human beings to blue whales.
Discosure: I detailed all this in my (2005) book, The Genomics Age.
What behavior can you blame on a one or two letter variation on DNA — the ACTG string of amino acids on one of 23 chromosomes in the human genome that 99.9 percent of all humans on the planet share? I’m looking.
Do your ears hang low? Have a habit of tongue rolling or are you sporting a widow’s peak? Thank your DNA!
You either can do this or you can’t. It’s a dominant trait you must inherent from at least one parent. It skips generations, as this code often passed intact.
Proven SNPs in this behavior. If you have one or another, you are biochemically and genealogically set up to do it. Not to say you can’t train yourself for the skill your genes don’t spell out for you.
A trait passed through the mother’s x chromosome or mitochondrial DNA, a widow’s peak was once highly desired and glamorous. Let’s hope it comes into fashion again. I have one : )