Have you ever wondered why some people have blue eyes, while most people have brown eyes?
Well, the answer can be found in genetics!
Genetics, in short, is the study of genes, which is what makes you, you! Every living thing is made up of genes.
Genes are like the “code” for your body to build itself; they tell cells what to do, what forms to take, and much more.
This “program” is created by the arrangement of four different chemical compounds, called nucleotides, that make up your DNA.
The arrangement is unique for each and every individual, and subtle differences in the order can have a big impact on someone’s appearance and character.
Are all blue-eyed people somehow related?
Your eyes are a certain colour because of your genes.
There is a gene that creates melanin in your eyes, which affects your eye colour.
People with blue eyes have the least melanin, while people with brown eyes have the most melanin.
This means that, long ago, everyone had the same colour eyes until someone’s genes mutated and started producing less melanin, affecting the eye colour.
This trait was then passed down over generations, which is why there are quite a few people with blue coloured eyes.
Hans Eiberg, a research professor at the University of Copenhagen who studies genes, said, “Originally, we all had brown eyes. We can conclude that all blue-eyed individuals are linked to the same ancestor.”
Cool Eye-Opening Facts:
Only 8% of the people in the world have blue eyes.
Some people have multiple eye colours.
Melanin not only determines eye color, but also helps protect the eyes from harmful sun rays.