By emma hynes
While you might find some similarities with others, no two people have exactly the same curl pattern.
Phenotype refers to the physical characteristics individuals express as a result of their genetics. Curly hair vs. straight hair is an example of phenotypic variation. So how do we end up with one vs the other?
Some traits can be determined by a single gene. In this case one trait would be considered dominant and one recessive. When it comes to curly hair it’s a bit more complicated.
It's not as simple as one gene being stronger or weaker; it's more like mixing colors to get a shade in between.
Hair texture is influenced by multiple genes (polygenic), which is why curly hair comes in various forms, from 2A to 4C.
The genetic architecture for hair texture also differs across populations. Different parts of the world have evolved different genetic "recipes" for hair texture.
Curly hair in a person from Ireland might be caused by different genes than curly hair in someone from Ethiopia or Brazil. This also leads to a wider variety in curly types.
Hair texture can be influenced by more than just genetics. Factors like hormones, environment, and age can all alter curl patterns.
From tight coils to soft waves, every curl pattern is shaped by a unique blend of genetics, biology and heritage.
Whether your curls come from one specific gene or a mix of many, they’re a reflection of generations of genetic diversity and personal history.
Find out more about how to care for your curls at the link below.