For a dog to display the blue coat color, what must it inherit regarding the dilution gene?

Answer

The recessive allele for dilution from both parents

The blue coloration is only displayed phenotypically when the dog inherits the recessive allele for dilution from both its mother and father. Inheritance of only one copy typically results in a black coat while carrying the gene recessively.

For a dog to display the blue coat color, what must it inherit regarding the dilution gene?
DogpitbullbreedAmericanpurebred