Kolmvärvilised

Kolmvärvilised refers to a phenomenon primarily observed in certain animals, most notably felines, where they exhibit a coat coloration pattern consisting of three distinct colors: typically black, white, and a reddish-orange or ginger. This specific pattern is most commonly associated with female cats. The genetic basis for this coloration is linked to the X chromosome. The gene responsible for orange or black fur color is located on the X chromosome. Since female cats have two X chromosomes (XX), they can carry both the allele for orange and the allele for black fur. The presence of white spotting is determined by a separate gene. When both the orange and black alleles are present on the two X chromosomes, along with a white spotting gene, the resulting coat displays the characteristic tri-color pattern. Male cats, possessing an XY chromosome configuration, typically only carry one allele for fur color on their single X chromosome, thus usually appearing either orange or black, with or without white. Male tri-colored cats are rare and are usually a result of a genetic anomaly such as Klinefelter syndrome (XXY). This distinctive coloration is often referred to by various names depending on the region, including calico or tortoiseshell and white.