COLOUR GENETICS FOR SHETLANDS
By Linda Wendelboe
Click on the button for a Glossary of Genetic Terms
Adalsteinsson (see below) did the early work in figuring out Northern
European Short Tail Sheep colour genetics. His work is used as a
basis for Shetland as well as Icelandic and other breed colour genetics.
At each gene, a sheep will have two alleles; one inherited from its mother
and one inherited from its father. Its genotype is made up of all
of these pairs of alleles.
B Gene, Brown or Black: The B gene controls whether the sheep will be black toned (black or grey