In 1998, a research group led by psychologist Plomin at the London Institute of Psychiatry reported the molecular biological basis of general intelligence on the sixth pair of human chromosomes. He carried out DNA analysis on 51 children with IQ 103 and 51 children with IQ 136, examined 37 molecular markers, and found that a special base sequence in the DNA structure was related to IQ. He named it IGTF2R, whose structure was similar to the receptor gene of insulin like growth factors. Almost all subjects have 1-2 alleles 4 and 5, but the number of people with allele 5 in half of the high IQ people is more than twice the average of all subjects. In another group of 102 subjects, half of them have an IQ of 160, and most of them have allele 5. [1]
