Within this set there are three types;  A (Agouti pattern) at (Tan pattern) and a (self-pattern) with A being dominate followed by the at and finally the most recessive being a the (Self Patten)

 

A Rabbit can have only two of these sets, remember if there are (AA or atat or aa) they homozygous pairing (homo- meaning the same).

 

When the genes are not the same, such as A,at, this is called heterozygous pairing (hetero- meaning different). So in simple terms, a rabbit can be an Agouti A but can carry the at gene, but the A being dominate you will only see the agouti pattern in the rabbit.

 

Click on the image to link to a more comprehensive explaination of that gene type.