Elementary rules for the genetics of cats

1. Two long-haired parents cannot produce a short-haired kitten. Only the parental colors determine the color of the kitten. The colors of other cats present in the pedigree do not have a direct effect on the color of the kitten.
2. Kitten-cat always gets its color from the mother.
3. A kitten-cat always gets a color, which is a combination of the colors of the father and mother.
4. In order to get genetically red or genetically cream in a kitten-cat litter, it is necessary that the father be genetically red or genetically cream, and the mother must also have red or cream colors in the genotype
5. Dominant characteristics (dominant colors: white, silver, tabby, bicolor, etc.) cannot miss a generation. They cannot pass, for example, from grandfather to grandson without appearing in their father.
6. A kitten of dominant color (black, red, tortie, etc.) must have a parent of dominant color.
7. Two parents of recessive color (cream, blue, etc.) cannot produce a dominant color kitten (black, red, tortie, etc.)
8. The white kitten must have a white parent.
9. A kitten with a white undercoat (veiled, shaded, smoky) must have a parent with a white undercoat.
10. A veiled / shaded kitten must have at least one parent who is either veiled / shaded or tabby.
11. A veiled / shaded parent can produce a smoky kitten, but a smoky parent cannot produce a veiled / shaded kitten.
12. A tabby kitten must have at least one parent who is either veiled / shaded or tabby.
13. All red cats have some degree of tabby. The ability to produce tabby offspring depends on whether the red cat (or cat) is a real tabby, i.e. whether she has a tabby parent or veiled / shaded, or is she just a red cat with an outwardly pronounced tabby pattern. Red tabby, if it is not a real tabby, cannot produce a descendant of a tabby of any other color, unless it is tied to a real tabby (or veiled / shaded).
14. Tiger tabby kitten must have a tiger tabby parent.
15. A spotted tabby kitten must have a spotted tabby parent.
16. Multi-colored individuals (tortie, blue-cream, calico, tortie with white, tortie point, etc.) are almost always cats, but cats are sometimes born.
17. The bicolor kitten must have a bicolor parent.
18. Two color-point parents cannot produce a non-color-point kitten (see paragraph 8).
19. It is possible to get a kitten of the Himalayan color only if both parents are carriers of the Himalayan color (even if they themselves are of a solid color).
20. If one parent is of the Himalayan color, and the other is not and is not even a carrier of the Himalayan color, then in the offspring there cannot be a single kitten of the Himalayan color.