What is dominant in cats if bobtails are recessive?

If bobtails are recessive in cats, then the normal tail length is the dominant trait.

Here's why:

* Recessive traits only appear in the phenotype (physical appearance) if an individual inherits two copies of the recessive allele.

* Dominant traits will be expressed even if an individual only inherits one copy of the dominant allele.

So, a cat with at least one copy of the dominant allele for normal tail length will have a normal tail, even if it also carries the recessive bobtail allele. Only a cat with two copies of the recessive bobtail allele will have a bobtail.