So, there are some traits and mutations that I don't think are worth making a whole entire page about, so I decided to make a page about all the miscellaneous things that shouldn't be too hard to explain.

Traits:

Fur length:
Dominant trait: Short fur (represented by a capital L)
Recessive trait: Medium or long fur (represented by a lowercase l)
Extra Comments: None

Folded ears:

Dominant trait: Folded ears (Represented by a capital Fd)
Recessive trait: Non-folded ears (Represented by a lowercase fd)
Extra Comments: Folded ears are usually found in a breed known as the Scottish Fold, but are not restricted to this breed. Scottish cats that do not have the folded ear allele are known as Scottish Straights. Scottish folds usually suffer from joint problems known as "weak cartilage" due to their folded ears. It is never a good idea to breed two Scottish Folds together, since a homozygous dominant fold (a fold with two dominant alleles) would be especially vulnerable to joint problems.

Munchkin (short legged) cat:
Dominant trait: Short legs
Recessive trait: Normal legs
Extra Comments: Like cats with folded ears, it is never a good idea to breed two munchkin cats together, as a homozygous dominant cat would likely not survive birth. Munchkin cats sometimes suffer from arthritis similar to dogs with short legs, but munchkin cats suffer a bit less due to cats having more flexible spines than dogs. Munchkin cats are also known as sausage cats! Munchkin cats are known for their playful and friendly temperament, and can actually jump quite high despite their leg size.

Curled ears:
Dominant trait: Curled ears
Recessive trait: Normal ears
Extra Comments: Curled ears are mostly found in a breed known as the American Curl, where the cat's ears are curled backwards slightly.

Bobtail (Manx):
Dominant trait: Stumpy tail
Recessive trait: Normal tail
Extra Comments: This trait is normally associated with skeletal issues. Like the Scottish Fold and the Munchkin, any Manx cat that is born with two stumpy tail alleles (homozygous dominant) would not survive birth. This is why it isn't a good idea to breed two short-tailed Manx cats together.

Bobtail (Japanese):
Dominant trait: Stumpy tail
Recessive trait: Normal tail
Extra Comments: Commonly found in the Japanese Bobtail! Unlike the Manx, this trait does not come with any major skeletal issues. This would be a much better trait to implement if you are writing a Warriors fanfiction.

Ojos Azules (Cornflower blue eyes):
Dominant trait: Ojos azules
Recessive trait: No ojos azules
Extra Comments: This gene is incredibly rare, and is one of the few eye colors that are inherited.

Mutations:

The word "mutation" is usually associated with negative connotations in most media, but in biology, mutations aren't always bad. Some are bad, some are good, and some are completely useless, but not harmful. All of the traits listed above are genetic mutations, but the mutations I'm about to list are ones that can't be inherited.

Missing X chromosome:
This is an incredibly rare chromosomal mutation that can happen to females in biology, not just cats. A she-cat with this mutation would only have one X chromosome instead of two, and no Y chromosome. Females with this mutation are often infertile to a certain extent. Normally, a she-cat would receive one sex-linked fur color allele from both parents, but a she-cat with one X chromosome can only receive an allele from either their mother, or their father. A female with only one X chromosome would not be able to be a tortoiseshell, and cannot be a carrier of a recessive trait.

Extra X chromosome:
This is an incredibly rare chromosomal mutation that can happen to males (not just cats). A male with this mutation would have two X chromosomes, and one Y chromosome, and would usually suffer from infertility to some extent. A tom with this mutation would either receive an X and Y chromosome from the father, and one X chromosome from the mother, or 2 X chromosomes from the mother, and one Y chromosome from the father. Because of this, a tom with this mutation could end up being a tortoiseshell! If a tom receives one ginger allele, and one non-ginger allele, they would be a male tortoiseshell. Since this mutation is rare, male torties are incredibly rare.

Please let me know if you want me to explain any other traits or mutations!