Genetics decide a lot about how a person will look or behave, but it's not just about getting dad's height or mum's nose.
While they're not quite as interesting as the ones found in X-Men, there are a few things about yourself that you might have thought were normal but are actually anomalies.
Coriander tastes like soap:
There's a certain subset of the population to whom coriander tastes like soap due to the bitter taste gene PTC, while for others it tastes like a delicious garnish.
Ants are known to have the distinctive odour of formic acid, but only some people can smell it. Most people say it smells quite lemony or citronella-like, while one species smells like blue cheese.
No, this doesn't mean you're better at hitchhiking. Having a hitchhiker's thumb means your thumb is slightly differently shaped, bending backwards at the first joint.
Originally viewed as an omen that you would be widowed early in life, the widow's peak is when a person's hairline makes a small V shape on the forehead.
The cutely acronymed Autosomal Dominant Compelling Helio-Ophthalmic Outburst Syndrome simply means you sneeze at bright lights. It's been found to affect up to 35 percent of people in the US.
Perhaps the simplest and most common example from high school genetics, blue eyes are caused by a recessive gene. But did you also know blue eyes have been found to be more sensitive to light?
Also called the "butt chin," a cleft chin is a slight fissure running down the middle of the chin, caused when the left and the right side of the chin doesn't quite fuse together properly during formation.