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Genetic Basis of intelligence involves about twenty times the genes as the genes for height

Genetic Basis of intelligence involves about twenty times the genes as the genes for height

” Scientists looking for the genes underlying intelligence are in for a slog. One of the largest, most rigorous genetic studies of human cognition1 has turned up inconclusive findings, and experts concede that they will probably need to scour the genomes of more than 1 million people to confidently identify even a small genetic influence on intelligence and other behavioural traits. The results were published in the Journal Nature.
In a 2013 study comparing the genomes of more than 126,000 people, the group identified three gene variants associated with with how many years of schooling a person had gone through or whether they had attended university. But the effect of these variants was small — each variant correlated with roughly one additional month of schooling in people who had it compared with people who did not.In another study of 106,000 people, researchers picked out 69 gene variants most strongly linked to education level. To establish a more direct link with IQ, they cross-checked this list with genetic variants in a second sample of 24,000 people who also had taken tests of cognitive ability. Three gene variants were found to be associated with both educational attainment and higher IQ scores.

The three variants the researchers identified were each responsible for an average of 0.3 points on an IQ test. (About two-thirds of the population score between 85 and 115.) That means that a person with two copies of each variant would score 1.8 points higher on an intelligence test than a person with none of them.

To put those figures in perspective, those variants have about one-twentieth the influence on intelligence as do gene variants linked to other complex traits such as height, says Daniel Benjamin, a social scientist at Cornell University in Ithaca, New York, who co-led the study.

Benjamin says that studies of more than 1 million people will be needed to find enough common gene variants to explain 15% of the variation across people in IQ scores, educational attainment and other behavioral traits.”

Maybe IQ 550 is Impossible or Meaningless550 IQ would be like a 13 foot tall person
Physiology limits practical height
What are intelligence limits ?
Brain structure
Average human height is 70 inches and 3 inch SD (standard deviation)
8 feet 1 inch – 97 inches this is 9 Standard Deviations over average
235 IQ is the equivalent in intelligence of a 8 foot 1 inch person

Geniuses and Society

5% of population with 30 points higher intelligence might be about $14000 more GDP per capita
5% of population with 120 points higher intelligence might be about $56000 more GDP per capita
What would a society with tens of millions of Edisons, Einsteins, Steve Jobs and Elon Musks be like ?
Could we get beyond them in capability?

5% of population significantly intelligence enhanced would be possible if IVF takes off and embryo selection and genetic engineering with it over the next 10-20 years.”


Posted on: September 25, 2014, 6:06 am Category: Uncategorized

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