The Neva Masquerade is the colourpoint variety of the Siberian Forest Cat, defined by obligate homozygosity at the colourpoint locus (cs/cs) overlaid on the full Siberian genetic color background, and registered as a separate FIFe breed from the standard Siberian (SIB). Valid EMS codes for NEM encompass all Siberian base colors — the full B-locus allelic range, dilute variants, O-locus tortie expression, and the Inhibitor (I) locus silver and golden series — each expressed exclusively in the colourpoint phenotype (33 suffix). Feline genetics programs managing both SIB and NEM lines require precise EMS color calculator tracking, as SIB × NEM crosses produce both cs/cs (NEM) and C/cs (SIB carrier) offspring that must be registered to their respective breed codes.
Common recessive carriers
All Neva Masquerades are cs/cs (colourpoint homozygous). Chocolate (b), cinnamon (bl), and dilution (d) recessives are all present and accepted. The Inhibitor (I) locus produces silver-point variants (e.g., black silver tabby-point). SIB × NEM matings produce cs/C offspring (straight-patterned Siberian carriers of colourpoint) which must be registered as SIB. O-locus tortie-point NEMs are produced by hemizygous (O/o in females) or hemizygous O in males × tortie females.
Breed-specific restrictions
All NEMs must be cs/cs. Non-pointed offspring from NEM × NEM matings are genetically impossible (cs/cs × cs/cs = 100% cs/cs) but any apparently non-pointed NEM must trigger pedigree investigation. Ticked tabby (25) is accepted in NEM (mirroring SIB). Dominant White (W) is not recognized for NEM. Amber (e) is not accepted. Cinnamon (bl) is accepted (mirroring SIB standard).
Pattern quirks
All tabby pattern variants (22, 23, 24, 25) are accepted in the colourpoint phenotype, including the breed-distinctive ticked tabby (25). Tabby-point NEMs (lynx-point, 21 series) are popular and accepted. The Inhibitor (I) locus produces silver-tabby-point phenotypes in NEM, e.g., black silver mackerel tabby-point. White-spotting (S locus) bicolor variants in a pointed cat — such as bicolor-point — are accepted and coded with both the bicolor and colourpoint EMS suffixes.
NEM n 33Seal ColourpointNEM a 33Blue ColourpointNEM n 22 33Seal Classic Tabby-PointNEM ns 23 33Seal Silver Mackerel Tabby-PointNEM f 33Seal Tortie ColourpointNEM a 04 33Blue Bicolour ColourpointFree online tool to predict kitten coat colors based on Mendelian genetics. Select the breed and appearance of sire and dam to see color probabilities.
Enter the appearance of both parents to calculate color predictions.