Why are siamese cats getting darker and darker?

Unlike other cats, Siamese cats' body color will not change, but their coat color will change with the weather. Just like the black on its face, if the weather gets cold, the color will get darker.

There are melanocytes in cat hair follicles, and the formation of melanin depends on the action of tyrosinase. If the cat's tyrosinase activity decreases and it can't produce enough melanin, its coat color will become lighter. If tyrosinase is completely inactive, it can only grow white hair.

However, Siamese cats are extremely sensitive to temperature because of poor stability of tyrosinase due to genetic problems. When the temperature is low, it can work normally to produce melanin. When the temperature rises, it is impossible to make melanin for cats normally.

Extended data:

Overall appearance:

The head is slender and wedge-shaped. The headgear is flat, and the top of the head is in a straight line with the tip of the nose when viewed from the side. The face is sharp and V-shaped, and the nose and mouth are sharp, forming a V-shape from the kiss to the tip of the ear. The bridge of the nose is high and straight, and it is an equilateral triangle from the nose to the tip of the ear. Cheeks are thinner and teeth are scissors bite. Big ears, wide base, pointed ears, upright. Medium-sized eyes, almond-shaped, blue, deep or light.

The extension line from the inner corner of the eye to the tip of the eye forms a V-shape with the tip of the ear. Eyes slightly convex. The tail is long and thin, and the top is slightly curled. The length is equal to the hind limbs. Good flexibility, muscular, slim, angular, thin and long legs. The palm of your hand is small and oval. The tail is long and beautiful, and the tail is pointed.

References:

Baidu Encyclopedia-Siamese Cat