by Lauren K
Next time youāre about to get a lecture about your grades, try blaming it on your genes! An old study of inherited intelligence of fraternal and identical twins has brought to light how much of your intelligence is due to genetics and the environment.
Surprisingly, the study of inherited intelligence isnāt as recent as you may have thought. According to a recent study directed by Dr. Bouchard at the University of Minnesota, evidence supports that nearly 70 percent of your intelligence is inherited! Studies beforehand only suggested fifty percent, but this twin study pointed towards inheritance being, āthe overwhelming contributor to intelligence test scores.ā
Now, only six years ago and using more up- to- date technology, Dr. Bouchard conducted a lengthy study also using both kinds of twins with an MRI to distinguish areas of the brain. These were their results.
In the area of the brain that specializes in language, and another area mostly for perception, identical twins appeared to have ninety-five to a hundred percent shared. The cognitive area of the brain seemed to display the closest percentages. Dr. Thompson believes that the findings show that environment has little to do with intelligence. In fraternal twins, the percentage was lower, but still supplied evidence that intelligence was related to inheritance. So far, a single gene has not been found to specifically code for intelligence, but the evidence does show that inheritance is a factor.
Be sure to know that with many items in science, there are contradicting hypotheses and many doctors agree, disagree, and go back and forth on a decision. So in short, while there is prominent evidence that intelligence is inherited, there are some doctors who disagree, and others who say itās a mixture of inheritance and environment.