Chapter 6: Intelligence
Ridley debates if intelligence is natural that is inherited from genes or if intelligence can be trained. An evidence he found is from a gene called IGF2R located on chromosome 6 that can be found in a group if gifted children chosen from all over America because they have IQ's closed to 160. The different sequence in the IGF2R is what separated these kids from the average people. Studies have also shown that on separated twin that heritability influence intelligence and personality. Ridley also mentions that intelligences gens are more expressive later in life because people can choose their own environments and comfort zones which allows the genes to express themselves more because they are more free.
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