You might have heard that all orange cats are male, leading you to believe that if you spot an orange cat, it must be male. This raises the question of whether or not orange cats can be female. The idea that all orange cats are male is a myth, but like all good myths, it is rooted in a little bit of fact. Orange cats are overwhelmingly male, but not entirely. Orange cats can be female, but they are far less common; it all comes down to genetics.

Here is everything you need to know about orange female cats, including a primer on the genetics that explains why so many male cats are orange.

Can Orange Cats Be Female?

Yes. Orange cats can be female. But the reason that there is a misconception that all orange cats are male is because the vast majority of them are. Roughly 80% of orange cats are male. That means that for every five ginger cats, only one will be female, but those numbers can be slightly misleading.

Since fur color is tightly linked to the sex of the cat, the prevalence of the gene in certain cat colonies can lead to far more or fewer orange female cats than expected. For example, if there is a cat colony with a large number of orange cats, the likelihood of running into a female orange cat is much higher than if you run into a random stray on the street.

You could go your whole life without running into an orange cat that is female. Or you can run into a number of orange cats that are female. The local numbers will be dependent on the local gene pool. But the reason that there are so many orange cats that are male comes down to basic genetics.

The Science Behind Orange Cat Genetics

In order to understand why most orange cats are male, we must first cover some basic genetic information. This gets a bit tricky, but stay with us, because it’s also really interesting!

Every characteristic we see on the outside is determined by our genotype, and the genotype comes from the chromosomes received from the mother or father. The phenotype is the external expression (physical appearance) of the genotype. Check out below for a bit more of an explanation into how this works.

You may be familiar with the X and Y chromosomes – these are the ones that determine sex. Each individual receives one of these chromosomes from their parents; the X chromosome from the mother, and either an X or a Y from the father.

XX = female

XY = male

The Y chromosome can only come from the male, so each embryo has a 50:50 chance of being male or female.

Feline coat color comes from two base color genes: yellow and black. Ordinarily, coat color is determined by the combination of these genes from both parents, with different genes dictating the pattern and dilution of the color. The one exception to this is the gene for the orange coat color in cats.

Because of this, male cats will have a 50:50 chance of being either black or orange, but they may be solid, tabby, or white and ginger variations. In males, the orange gene blocks the expression of the black gene, which is why you never see calico or tortoiseshell male cats; if there is orange, there will be no black (with the rare exception of males with an extra X chromosome). Females, however, can be either ginger, black or a combination of the two (calico, tortoiseshell). This is a very unusual situation where the two genes (black and orange) are both expressed. Here’s how it works:

Ordinarily, we would expect the XX to produce an orange female, but in this case, the rules are completely broken, and the two genes merge to create a mixture of black and orange.

How Rare Are Female Orange Cats?

Female cats that are orange in color are very rare. On average, only 1 in 5 orange cats will be female. In local populations, these numbers can be far higher or lower depending on the gene pool. Some areas will have a very low prevalence of the orange gene, while other areas might have a higher prevalence of the orange gene. Overall, if you spot an orange cat in the wild or at the shelter, statistically, it is more likely to be male. Some statistics skew even further, suggesting that 82% of orange cats are male, and just 18% female.

Are Male Orange Cats Infertile?

No. Some people believe that orange cats are infertile due to confusion about feline genetics. This idea comes from the fact that in order for a male cat to have the calico or tortoiseshell phenotype, they must have an extra X chromosome, and this is what renders them infertile.

Are Orange Cats More Unhealthy Than Other Colored Cats?

No. The genes that produce the orange coat color in cats only affect that particular trait. They are not linked with any particular genetic health conditions. However, if cats are selectively bred for coat color alone, it may lead to other, potentially problematic traits, becoming more prevalent, which is why it is important to consider the whole picture when breeding for a particular characteristic.

A Bit More Detail About Predicting Phenotypes

Each chromosome is made up of a pair of alleles, and it is the pairing of these alleles that will determine what genotype and phenotype is created. If the dominant allele is present, the phenotype will be the dominant color, so for the recessive trait to be seen, the genotype must be made up of only the recessive alleles.

Brown eyes are the dominant trait = B Blue eyes are the recessive trait = b

A very clever Austrian monk by the name of Gregor Mendel worked out a way to look at these alleles back in 1865 whilst studying peas. Using these “punnett squares”, we can predict the genotype and phenotype of offspring based on the genotype of the parents.

Determining the Color of the Eyes

So you can see that parents that both have brown eyes can still have offspring with blue eyes, but if both parents have blue eyes, they will only have offspring with blue eyes.

These probabilities apply with each individual offspring, so it doesn’t mean that if there are four children with Bb parents, one will definitely have blue eyes, for example. It means that each child has a 25% chance of having blue eyes.

This type of genetic probability prediction can be applied to virtually any characteristic, from hair color, blood type, even genetic diseases.

Conclusion

Orange cats can be female, but you are more likely to see a ginger male. Over 80% of all orange cats are male, but that still leaves roughly 1 in 5 orange cats that are female. These numbers can be influenced by local population genetics and individual colonies. The expression of the orange coat color is based on a combination of genes that are unique to cats, and a perfect example of how cats don’t like to follow the rules, even when it comes to genetics!

Image Credit: Irzhanova Asel, Shutterstock