Here's a breakdown of how the "B" gene affects mini Aussie coat color:
* B (Black): This is the dominant allele, meaning it will always be expressed if present. It produces a black coat.
* b (Brown): This is the recessive allele, meaning it will only be expressed if both copies of the gene are "b". It produces a brown coat (sometimes called liver or chocolate).
Therefore, a mini Aussie can have one of three possible combinations of "B" genes:
* BB: Black coat
* Bb: Black coat (because "B" is dominant)
* bb: Brown coat
It's important to note that the "B" gene is just one of several genes that influence coat color in Australian Shepherds. Other genes, such as the "A" gene (which determines agouti pattern) and the "S" gene (which determines merle pattern), also play a role.
If you are interested in learning more about the genetics of mini Australian Shepherds, I recommend researching online resources like the Australian Shepherd Club of America website.