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Genetic IQ tests could mean choosing how smart your kids are

 Unfortunately, we aren't completely sure as to why that happens. While we know it involves genes (and we know that around 65% of the genes that determine IQ are inherited), we don’t know which genes make the difference. If we did, we could predict intelligence in an embryo. That’s what a Chinese company called BGI has been working on.

BGI has a cognitive genomics section that's mapping the genomes of math whizzes. The theory is that once the genomes are mapped, we’ll know which genes cause intelligence. We've isolated genes in the past, such as those that cause red hair or left-handedness. Those may be simpler than genes for intelligence, but there’s no fundamental reason why we couldn't figure it out.

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