Female cats have two copies of the X chromosome. Since male cats only have one copy of the X chromosome, they only have the instructions to produce eumelanin or pheomelanin. Interestingly, the genetic instruction for making one or the other sits on the X sex chromosome, which means its expression is also sex-linked. These two types of pigmentation are mutually exclusive – each follicle of fur is colored by either one, or the other. The tortie pattern is a patchwork of areas of fur pigmented by eumelanin (which is black) and areas of fur pigmented by pheomelanin (which is red). And there’s some important information you’ll always be able to predict when you see a tortie Ragdoll kitten… So experienced breeders can often predict what colors and patterns they expect in a litter. Happily for Ragdoll breeders and enthusiasts, the inheritance of tortie points and the colors they come is straightforward and well understood at a genetic level. Lynx cats have a tell-tale pale thumbprint in the center! Tortie Ragdoll Genetics But, if you’re not sure whether a tortie Ragdoll is also lynx, take a look at the side of their ears. The Ragdoll breed standard specifies that these patterns ‘resemble lynx points more than tortie points’. ‘Torbie’ is a mash up of the words ‘tortoiseshell’ and ‘tabby’, because this pattern combines both features. The difference between torbie vs tortie points is that lynx/torbie points have visible dark and light stripes in the seal, chocolate, blue or lilac patches of their coat. Lynx point Ragdolls are also known as ‘torbie cats’. Tortie lynx pointsįinally, Ragdolls can also be registered in four tortie lynx variations: However, they are known (by increasing coverage of white patches) as either mitted, bicolor or van pattern, rather than calico. Ragdoll cats with tortie points and white patches do exist, and are recognized by their breed standard. The larger the white patches in their coat, the larger each individual black-based and red-based patch becomes too. Calico cats are tortoiseshell cats with large white patches. The difference between tortie vs calico is the addition of white patches. And you’ve probably already guessed that this is a dilute version of the chocolate tortoiseshell Ragdoll pattern above! Calico Ragdoll cat Their eyes are blue and their nose and paw pads are a dark, lavender pink. Lilac cream point Ragdolls have a ‘glacial’ white body, and their points are a warm frosty gray mottled with pale cream. Essentially, the blue cream tortie pattern is a dilute version of the seal tortie point pattern above. Their eyes are blue and their nose and paw pads are slate gray. Blue cream pointīlue tortie Ragdoll cats have a bluish white to platinum grey body, and their points are a deep blue grey mottled with cream.
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