The basic genetic makeup of a homozygous Snowshoe cat is:
L/L (short hair)
S/s (the heterozygous form of the white spotting factor) with variant pigmentation factors
D/D (dense pigmentation) or
d/d (maltesed pigmentation (depending upon the desired point colors)
The variant pigmentation factors will produce the following colors/patterns:
B/B, D/D, S/s - Seal point mitted or bicolor pattern
B/B, d/d, S/s - Blue point mitted or bicolor pattern
B/B, D/d, S/s - Seal point mitted or bicolor pattern carrying the recessive maltesing gene
In order to produce additional dilute colors, the following basic factors must be introduced:
b/b, D/D, S/s - Chocolate point mitted or bicolor bl/bl,
D/D, S/s - Cinnamon point mitted or bicolor b/b, d/d,
S/s - Frost (Lilac) point mitted or bicolor
b1/b1, d/d, S/s - Fawn point mitted or bicolor
The dominant gene of the white spotting factor (S/S) produces more white than is desirable (more
than two thirds white). This much white would affect the appearance of the Snowshoe that results from the contrast between
the dark points and the white spotting pattern.
The mitted pattern is generally limited to paws, belly, chin, and chest with no white facial pattern,
however, small mustache(s)' may be within the mitted limits. The white pattern areas are limited to one third of the cats
The bicolor pattern includes the same pattern areas as the mitted and generally features a facial
pattern which may be in the shape of an inverted 'V', blaze, partial 'V' or large 'mustache(s)'. The white pattern areas generally
exceed one third of the cats coloring and is generally limited to two thirds of the cats coloring.
The heterozygous form (S/s) of the white spotting factor produces both mitted and bicolor patterns.
What divides the two patterns is the propensity of the white spotting factor for producing either mitted or bicolor patterns.
In attempting to produce the perfect' pattern which results in the perfect' inverted V' face, the spotting factor must have
the basic bicolor propensity. This propensity is what makes it so difficult to produce the perfect' pattern desired by many
The bicolor pattern covers from one third (1/3) to two thirds (2/3) of the cat’s body. This
means that in order to get the perfect V' facial pattern, it is necessary to introduce the propensity for a bicolor pattern,
and in doing so, the propensity for increased white on the legs and body increases as well.