Reynard
Guru
- Location
- Cambridgeshire, UK
@Reynard, thanks for the clarification on the whiskahs . If I was a cat, and not already married, I'd ask Lexi to marry me! 💜 Gorgeous kitty (and vibrissae.) I never heard of a “blue tabby” here in the States, but I like the sound of it. 🐱
A blue tabby is the dilute of a standard black tabby like your other boy is.
It's the same gene that turns solid black to blue (like Lexi is), and solid chocolate to lilac. The difference between a tabby and a self is that the self has the tabby gene switched off.
Cat coat colour genes (except for white, which is a dominant and masking gene) are all recessive, so a cat needs two copies in order to display that particular trait.
The one exception to this is the gene for red, which is sex-linked. The y-chromosome is too small to carry the information, so the gene for red is only carried on the x-chromosome. It's why ginger males are so common compared to ginger females, as they only need one copy - either they are red (O) or non-red (o). A female cat needs two copies of (O) to be ginger. If she only has one, then she will be tortoiseshell.
HTH