She is heterozygous at the X-linked coat color locus.
These cats will be male but also sterile and cannot create offspring.
They're often placed in the entrances of homes and businesses to bring good luck.
A runt of the litter can grow up to be one of the out there! In either case, their coat may be a healthy mix of dark black or chocolate, with shades of ginger, red or orange color mixed in.
Mostly, calico cats are female but not all.
The red gene: Red Maine Coon The red actually known as orange and abbreviated to O gene is only carried on the X chromosome, which makes it sex-linked.