Browsing the current literature about Genes, I came across SNPedia, which is a wiki investigating human genetics. There you can find information about the effects of variations in DNA, citing peer-reviewed scientific publications.
Searching for IntelliGenes* , Genes associated with high intellectual performance, current scientific works point to the SNAP25 gene, which encodes a presynaptic terminal protein, primarily expressed in the brain. You can also visit the relevant SNPedia page (external link, opens in new tab)
In a more detailed search, I found the following chromosome positions currently being related to intelligence:
Chromosome position | SNPedia links | PubMed articles |
chr7:136339536 | Association between the CHRM2 gene and intelligence in a sample of 304 Dutch families | |
chr11:q12.2 | Moderation of breastfeeding effects on the IQ by genetic variation in fatty acid metabolism | |
chr20:10168496 | The SNAP-25 gene is associated with cognitive ability: evidence from a family-based study in two independent Dutch cohorts | |
chr20 | Association of CHRM2 with IQ: converging evidence for a gene influencing intelligence |
You can also search directly SNPedia for Intelligence and IQ
* IntelliGenes: is a term I just figured out relating Intelligence and Genes
