Surprising Traits Hidden in Your DNA (You Never Knew Were Genetic!)

Key Takeaways

• Genes don't just set eye color or height — they hide some seriously weird traits you never knew were genetic.
• From cilantro tasting like soap to sneezing at sunlight to being a "mosquito magnet."
• Many come down to a single SNP — one tiny difference that changes your whole experience.
• Fun, but backed by real science — and your DNA has surprises waiting.

When we say "genetics," we picture hair color, height, or looking like our parents. But our genes hide a surprising amount of quirky stuff. Here are traits that really are "because of your genes"!

1. Cilantro Tastes Like Soap

If coriander tastes like soap to you, your tongue isn't broken! A GWAS found a SNP near a cluster of smell-receptor genes on chromosome 11 — notably OR6A2 — that makes some people extra-sensitive to the aldehydes in cilantro, so they perceive a soapy smell.

2. Sneezing at Bright Light

Step into the sun and sneeze instantly? That's the Photic Sneeze Reflex (ACHOO Syndrome), inherited as an autosomal dominant trait and found in roughly 18–35% of people, with GWAS studies identifying associated genetic loci.

3. Being a "Mosquito Magnet"

Mosquitoes really do play favorites! The body odor they love is partly genetic. More in why mosquitoes bite some people more.

4. Dog Person vs Cat Person

Believe it or not, pet preference has a genetic component too. Twin studies suggest part of being a "cat person" or "dog person" lives in your genes — see are you genetically a cat or dog person.

5. Smelly Pee After Asparagus

Some people notice an odd smell after eating asparagus; others smell nothing at all — both "making" the odor and "detecting" it are genetic.

So What Do These Traits Tell Us?

Beyond the fun, these tiny quirks prove that a single SNP can change how we perceive the world — that's the power of reading your genetic code. Curious what else your genes hide? Start by exploring the future of DNA-based wellness.

A Final Note From the Geneus DNA Team

Everyone carries something special in their genetic code that no one else has. Your DNA is the most fun story you haven't read yet — so, which of these quirks describes you?

References

1. Eriksson N, et al. A genetic variant near olfactory receptor genes influences cilantro preference. Flavour. 2012. Springer
2. A Brief Review of Genetic Approaches to the Study of Food Preferences (OR6A2). PMC. NCBI
3. ACHOO Syndrome. Medical Genetics Summaries. NCBI Bookshelf
4. A genome-wide association study on photic sneeze reflex (Chinese population). PMC. NCBI
5. Achoo syndrome. NIH Genetic Testing Registry. NCBI GTR
6. Morris HH 3rd. ACHOO syndrome: prevalence and inheritance. Cleve Clin J Med. 1987. CCJM