Snips about SNPs: Evening chronotypes

The aptly named CLOCK gene is part of your core circadian rhythm. Recently, researchers have linked the circadian clock to a variety of different chronic conditions including obesity, heart disease, diabetes, and depression.

Your CLOCK gene variant may impact whether you are more likely to be active during the evening and stay up a little later.

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Check your genetic data for rs1801260 (23andMe v.4 and v.5):

  • G/G: higher activity in the evening, possible delayed sleep onset, increased risk for obesity[ref][ref][ref]
  • A/G: somewhere in between
  • A/A: normal

Members: Your genotype for rs1801260 is .

Want more details? Check out the full article on circadian genes.

*SNP stands for Single Nucleotide Polymorphism, which is when one of the nucleotide bases (the A, C, G, or Ts) is replaced by a different nucleotide base in a gene.  Want to know more about your genes? Read through all the Snips about SNPs



Author Information:   Debbie Moon
Debbie Moon is the founder of Genetic Lifehacks. She holds a Master of Science in Biological Sciences from Clemson University. Debbie is a science communicator who is passionate about explaining evidence-based health information. Her goal with Genetic Lifehacks is to bridge the gap between scientific research and the lay person's ability to utilize that information. To contact Debbie, visit the contact page.