Scientists Say: Allele
When genes come in two or more versions, they have a special name
![Brown eyes, blue eyes and green eyes all see perfectly well. Their different colors are due to variations, or alleles, in one gene.](https://www.snexplores.org/wp-content/uploads/2019/11/860-eye-color-header-5755182794_7480a4b0f9_o.jpg)
Brown eyes, blue eyes and green eyes all see perfectly well. Their different colors are due to variations, or alleles, in two genes.
Joaquin Villaverde/Flickr/ (CC BY-NC-SA 2.0)