As we await the arrival of Sequoia’s kitten, it’s fun to speculate on what its pattern and color might be. Unlike previous litters, Sequoia brings more genetic possibilities. Breeders should have at least a vague idea of genetics and that’s about what I have — a vague idea.
Simba Kahn is ‘color bred.’ He is pure shaded silver/shaded golden as far back as I can trace his pedigree which is six generations. He brings only one color to the table. Black. Technically shaded silvers and goldens are A. tabbies (agouti) and B. genetically black. They have a couple of other magical things going on that allow the shading and the gold vs the silver. But basically, they are black tabbies.
Sequoia, however, is a different story. Her lineage includes the rare chocolate color, recessive dilute, color point (Himalayan), both basic colors (red and black), tabby (agouti), and piebald (bi-color). Obviously with Simba Kahn’s genetic short comings, we are not taking advantage of Koi Koi’s diverse capabilities. We will never see a chocolate nor a dilute.
As I understand it, there are only two colors in cats – red and black. White is the absence of color and therefor not a color. There are two basic patterns (not counting bi-color also known as piebald) — tabby (known as agouti,which is dominant) and solid (sometimes called ‘self’ and is recessive).
Both parents are tabbies, so we know that the kitten will be a tabby, but what color and what pattern? Simba Kahn contributes only black, whereas Sequoia contributes one black gene and one red gene. Note that black will be perceived as brown. Females inherit one color gene from each parent so if it’s a female it will have genes ‘black black’ (a brown tabby) or ‘black red’ (a patched tabby or ‘torbie’). Males inherit only one color gene and that is from the mother. It is paired with the “Y” gene from the father. So a male kitten will get either black or red from Sequoia. Remember all the kittens will be tabbies which means they will have tabby markings interspersed in their coloring. Sequoia also carries the piebald gene which gives her the large white areas. The kitten has a 50% chance of inheriting piebald and it can be manifested either lightly (a tiny white dot) or heavily (almost all white).
If my reasoning is correct, these are the possibilities:
Female: red and brown tabby (torbie); red and brown bi-color tabby (same as Sequoia); brown bi-color tabby (brown tabby with white); brown tabby.
Male: red tabby; red bi-color tabby (white with red tabby markings); brown tabby; brown bi-color tabby (white with brown tabby markings.
To the above colors be sure to throw in Simba Kahn’s shading capabilities and you may see the kitten’s markings, whatever they turn out to be, fade to some extend as he or she matures.
I’ve attempted to figure out eye color genetics and find it very confusing. As I understand it, cats have the greatest variety of shading and eye color of just about any other animal. Some eye colors are linked to coat color such as the blue eyes in the Himalayans or the green eyes in the shaded goldens/silvers, but unless you breed from cats with strong eye shading you are likely to get a mish mash of colors in between. Sequoia’s pale orange eyes are the result of breeding a green eyed shaded golden to a blue eyed bi-color. I suspect that all of her kittens will have a pale orange color to their eyes much like their mother’s.