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There are undoubtedly lots of genes related to IQ. Because of its heritability score we know...

There are undoubtedly lots of genes related to IQ. Because of its heritability score we know that, to some extent, your IQ depends on which genes you received. What might the genes related to IQ actually DO such that differences in which genes two people get may contribute to differences in their IQ?

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Genome-wide association studies are revealed that intelligence is a highly polygenic trait. The intelligence trait is featured by 206 genomic loci and occupied by 1,041 genes. Each gene in these large numbers of genes give a small influence on the overall intelligence but efficiently and mostly during the different stages of development. Approximately 93% of 6,500 disease- or trait-predisposing SNPs, associated with intelligence, are located in non-coding regions. This study suggests that these SNPs regulate the transcription level of intelligence genes. Some intelligence genes are the GNL3 gene, NCAPG, and DDX27. GNL3 gene is important in stem cell proliferation, DDX27 changes RNA secondary structure also is involved in embryogenesis, and NCAPG steadies chromosomes during mitosis.

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