- Joined
- Nov 11, 2012
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This is extremely dumbed down, my understanding.
I. Snowshoes rely simply on a series of recessive genetic ticks in succession to one another in one cat. The gloving/mask gene and the color point gene were once thought to be one in the same, but expressed differently depending on the genetic thumbprint of the cat. However they are in fact separate genes entirely and both of these inherently different genes are necessary to produce a Snowshoe cat.
II. Specifically, a Traditional Siamese parent and a bi-colored American Shorthair parent must possess the same recessive genes for color points and white gloving/masking, respectfully, to produce Recessive Snowshoe offspring. Then, a Recessive Snowshoe must be bred to another Recessive Snowshoe to achieve a Dominant Snowshoe. However, if both possess these specific genes, the offspring must possess them as well and they must be as responsive as possible. If the offspring do not have this exact genetic code, the proper Recessive Snowshoe genes, it’s offspring will either look Siamese or Bi-colored American Shorthaired. Thus the rarity of the breed, as there is no proof of Recessive Snowshoe genes in any kitten without expensive genetic testing or expensive experimental litters. Once a snowshoe is attained, it can only produce a Snowshoe if bred to another snowshoe.
A1+B1=C1
A1= Female Traditional Siamese
B1= Male Bi-colored American Shorthaired
C1= Female Recessive Snowshoe
A2+B2=C2
A2= Female Traditional Siamese
B2= Male Bi-colored American Shorthaired
C2= Male Recessive Snowshoe
C1+C2=D
D1= Dominant Snowshoe
C2+A1(or B1)= Non Snowshoe
III. For the calico coloration effect to be dominant in a Snowshoe and for such a specimen to exist, one would have to breed a male Calico to a Siamese not once, but twice and breed the offspring of these breedings to one other. To achieve a Calico Male it must be either XY/XY or XXY.
XY/XY, also known as a Chimera male, occurs when two male embryos are conceived, one red male and one black male, then at some point in the womb, one embryo absorbs the other’s tissue and a single offspring is born possessing both sets of DNA, red and black. The male Chimera almost always show a Mosaic Pattern. Red/black Chimera males are never Calico, but genetically half red and half black. Thus they cannot bass on a Calico gene, but only the red or black gene.
XXY occurs when an X sperm and a Y sperm enter an egg(X) at the same time, but XXY males are almost always sterile (like 1:1,000,000,000,000{trillion}).
IV. Assuming there is a viable male Calico, it would have to be bred to A and A2 to POSSIBLY achieve a Calico Recessive Snowshoe, which would be female. Then one would have to achieve the same task again, but must attain a male Calico Recessive Snowshoe. Lastly, one would have to breed both male and female Calico Recessive Snowshoes to one another.
A1+E1=F1
A1= Female Traditional Siamese
E1= Viable Male Calico
F1= Female Recessive Calico Snowshoe
A2+E1=F2
A2 = Traditional Siamese
E1= Viable Male Calico
F2= Male Recessive Calico Snowshoe
F1+F2=G1
F1= Female Recessive Calico Snowshoe
F2= Male Recessive Calico Snowshoe
G1= Dominant Calico Snowshoe
V. So the odds of two non-registered, perhaps accidental or feral, female Snowshoes being bred to an almost impossible to find non-sterile male Calico, is astronomical. It is possible in theory, but in NO WAY probable.
Way more likely than the offspring of aforementioned breedings is a Diluted, Tortoiseshell, Color Pointed American Shorthaired with White Gloving/masking.
Perhaps this is a less...negative-know-it-all answer?
I. Snowshoes rely simply on a series of recessive genetic ticks in succession to one another in one cat. The gloving/mask gene and the color point gene were once thought to be one in the same, but expressed differently depending on the genetic thumbprint of the cat. However they are in fact separate genes entirely and both of these inherently different genes are necessary to produce a Snowshoe cat.
II. Specifically, a Traditional Siamese parent and a bi-colored American Shorthair parent must possess the same recessive genes for color points and white gloving/masking, respectfully, to produce Recessive Snowshoe offspring. Then, a Recessive Snowshoe must be bred to another Recessive Snowshoe to achieve a Dominant Snowshoe. However, if both possess these specific genes, the offspring must possess them as well and they must be as responsive as possible. If the offspring do not have this exact genetic code, the proper Recessive Snowshoe genes, it’s offspring will either look Siamese or Bi-colored American Shorthaired. Thus the rarity of the breed, as there is no proof of Recessive Snowshoe genes in any kitten without expensive genetic testing or expensive experimental litters. Once a snowshoe is attained, it can only produce a Snowshoe if bred to another snowshoe.
A1+B1=C1
A1= Female Traditional Siamese
B1= Male Bi-colored American Shorthaired
C1= Female Recessive Snowshoe
A2+B2=C2
A2= Female Traditional Siamese
B2= Male Bi-colored American Shorthaired
C2= Male Recessive Snowshoe
C1+C2=D
D1= Dominant Snowshoe
C2+A1(or B1)= Non Snowshoe
III. For the calico coloration effect to be dominant in a Snowshoe and for such a specimen to exist, one would have to breed a male Calico to a Siamese not once, but twice and breed the offspring of these breedings to one other. To achieve a Calico Male it must be either XY/XY or XXY.
XY/XY, also known as a Chimera male, occurs when two male embryos are conceived, one red male and one black male, then at some point in the womb, one embryo absorbs the other’s tissue and a single offspring is born possessing both sets of DNA, red and black. The male Chimera almost always show a Mosaic Pattern. Red/black Chimera males are never Calico, but genetically half red and half black. Thus they cannot bass on a Calico gene, but only the red or black gene.
XXY occurs when an X sperm and a Y sperm enter an egg(X) at the same time, but XXY males are almost always sterile (like 1:1,000,000,000,000{trillion}).
IV. Assuming there is a viable male Calico, it would have to be bred to A and A2 to POSSIBLY achieve a Calico Recessive Snowshoe, which would be female. Then one would have to achieve the same task again, but must attain a male Calico Recessive Snowshoe. Lastly, one would have to breed both male and female Calico Recessive Snowshoes to one another.
A1+E1=F1
A1= Female Traditional Siamese
E1= Viable Male Calico
F1= Female Recessive Calico Snowshoe
A2+E1=F2
A2 = Traditional Siamese
E1= Viable Male Calico
F2= Male Recessive Calico Snowshoe
F1+F2=G1
F1= Female Recessive Calico Snowshoe
F2= Male Recessive Calico Snowshoe
G1= Dominant Calico Snowshoe
V. So the odds of two non-registered, perhaps accidental or feral, female Snowshoes being bred to an almost impossible to find non-sterile male Calico, is astronomical. It is possible in theory, but in NO WAY probable.
Way more likely than the offspring of aforementioned breedings is a Diluted, Tortoiseshell, Color Pointed American Shorthaired with White Gloving/masking.
Perhaps this is a less...negative-know-it-all answer?