As a rule, the more white there is on the cat, the larger and more distinct the red and black patches will be. However, instead of the color red and black being dominant, calicos are generally white with patches of color. Approximately 1 in every 300 tortoiseshell is a male.Īlso known as tri-colors, calico cats are similar to tortoiseshells. As such, they are almost always infertile. But, these males are genetically abnormal, having a third sex chromosome (XXY) instead of the normal XY. Very rarely, these colors may appear in male cats. Just like in humans, two X chromosomes are most likely found in females. Genetically, tortoiseshell and related colors (blue-cream, patched tabby, calico, etc.) are the result of a sex-linked gene, requiring two X chromosomes to appear. Patched patterns feature solid patches of the black or red hair. Brindled patters give a more fluid appearance, as the colors are woven together. In general, there are two main patterns: brindled and patched. Not only can the colors of the tortoiseshell cats vary between each individual cat, but the patterns of the colors can as well. This color is often called the “torbie” because it is a tabby tortie. Another is the “brown patched tabby” looks almost like autumn leaves, covered with patches of brown tabby and patches of red tabby. It is the dilute version of the more common red and black coat. Other types of tortoiseshell cats include the “blue-cream” (also known as the blue tortie) is randomly patched all over with blue and cream. The patches can range from being very mingled or they may be more distinct blocks of color. Tortoiseshell cats, also affectionately named “torties”, have a consistent mix of orange/red and black, creating a unique coat unlike the ticked tabby pattern. If you haven’t read part 1, click here! In this post, I will be covering the remaining coat patterns: tortoiseshell, calico, and color-point as well as some other miscellaneous facts! This is a continuation of the series about feline genetics.
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