Science researchers have discovered that there are genes for specific smells that not everyone have. The most popular tests they have done would be fish, licorice, and cinnamon. The gene trace amine-associated receptor 5 (TAAR5) is an olfactory receptor responsible for the fishy smell. Personally, I could go without this receptor and some are lucky enough not to smell fish, unfortunately most of us can. researchers say that people who have this gene do not have a strong sensitivity to the smell of fish, while others who don't have this gene do have a strong sensitivity to the smell. Likewise, carriers of the gene were able to accurately name and describe the intensity of the smell much more accurately than those who are not carriers. This all ties in with human perception as well as behavior. With this study, researchers and scientists are looking for ways to use these receptors to smell COVID-19 on people. This way dogs are able to sniff out people who have contracted COVID-19. This would be very interesting for the future and I am excited to see what comes of it.
https://medicalxpress.com/news/2020-10-gene-fishy-olfactory-gwas.html
https://www.sciencedaily.com/releases/2019/04/190430164208.htm#:~:text=Small%20differences%20in%20olfactory%20receptor,another%20smells%20nothing%20at%20all.
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