MC1R

I talked about the 5 alleles of the E-locus which are responsible for the "disegno/colore primario" of the basic 5 phenotypes of EACH chicken.
That is how we can determine the 5 basic disegno/colore "families" !

1 of these 5, the "ER" (Betulla) was found to exist in 3 variants (mutations) because of 3 different amino acids (the building blocks within each allel).

All 3 variants occur in the typical Italian varieties, that is why I found it interesting enough to tell you about this, so you can better understand what is going on in your hobby.