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CU study relies on twins and their parents to understand height-IQ connection
Date:8/27/2013

ts by the Colorado Twin Registry at CU-Boulder and the Queensland Twin Registry at the Queensland Institute of Medical Research in Australia.

Keller and his colleagues found that for the twins in their study, the correlation between height and IQ was not impacted by environmental conditions. Though Keller cautions that in societies where there is more nutritional variation among families, environmental factors could come into play.

The research team found that pleiotropy and assortative mating were about equally responsible for the genetic connection between height and IQ.

"It does look like there are genes that influence both height and IQ," Keller said. "At the same time, it also looks like people who are taller are slightly more likely to choose mates who are smarter and vice versa. Such mate choice causes 'IQ genes' and 'tall genes' to become statistically associated with one another. There are a lot of exceptions, but there's a statistical relationship that does happen more than would be expected by chance."

Now that the CU-Boulder team has built a computer model that is capable of disentangling the causes for linked traits, Keller said he hopes twin registries will begin to collect more data from parents and that other people in the field take advantage of the model.


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Contact: Matthew Keller
mathew.c.keller@colorado.edu
303-735-5376
University of Colorado at Boulder
Source:Eurekalert

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