Extreme White Mosaic Chinchillas

(pictured) weanling Extreme Ebony and White Mosaic Royal Persian Angora chinchilla

Extreme white mosaic chinchillas are unique, rare, and fascinating. They are anomalies of gene expression, and cannot be reproduced with any reliable consistency. The descriptive is subjective, but is generally applied to mosaics with dramatic color contrast. Extreme white mosaics appear seemingly at random, with either no, or at most an imprecise ancestral predisposition. They can present as white and standard grey, or white and any other color or hybrid color. Some examples include beige and white, wrap around violet and white, ebony and white, extreme silver, etc... In regards to the genotype itself, extreme white mosaics are subject to the same lethal factor, and the same percentages of Wilson White inheritance as any other white mosaic chinchilla.

The Wilson White trait is an incomplete dominant, meaning it does not express compete dominance or coverage in the phenotype. The underlying color can 'bleed through' in a variety of ways. The Wilson White gene can present as predominantly white, white mosaic, or silver, all being heterozygous Wilson White. The differences in phenotype are due to other traits that effect gene expressions. Wilson White chinchillas are frequently classified as follows:

Predominantly White chinchillas - range from nearly all white to white with a light distribution of dark guard hair

White Mosaics chinchillas - include spotted and piebald appearing chinchillas

Silver chinchillas - have an evenly distributed grey veiling tip and dark guard hair, giving these chinchillas a smooth silver-grey appearance

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