| Hypothetical C Locus |
| Lesson #7 will be based on the Hypothetical C Locus. The Hypothetical C Locus attained it's name from the word Colored. It is postulated that there is a hidden locus and that within it contains the ability to dilute both eumelanin and phaeomelanin pigments, otherwise known as a double dilute. The typical gene associated with the C Locus is the Tyrosinase gene located on chromosome 21, however, to date no mutations affecting dog coat colors have been found and proven in the coding sequence for this gene. |
Albino Boston Terriers, also incorrectly advertised as "cremello and white", are currently the most taboo
color, or lack there of, for the Boston Terrier breed. Very little is known about the albino gene within any
breed of dog and most of the theories on the gene are just that, with no way to prove them to date. It is
believed that the albino gene, whatever it may be, is within the hypothetical C locus. This locus is said to
cause a double dilution which results in what in the Boston Terrier breed is known as a Cornaz Albino.
Cornaz Albino Boston Terriers are not solid white with red eyes as one would assume an albino would.
Actually, the part of the coat that would be any color that white, is faded to a off-white/tan color. For this
reason, people tend to believe that they are cream and white Boston Terriers. However, the easiest way to
tell the difference between a true cream and white Boston Terrier and a Cornaz Albino is simply
pigmentation. Cornaz albinos have no pigmentation of the nose, eye rims, or paw pads, everything is light
pink. The eyes are between a blue and green hue and are extremely sensitive to sunlight.
Much like honey and white Boston Terriers, Cornaz Albinos are born off-white/tan in appearance. Because
of this there are those that have been duped by unscrupulous breeders saying that the puppies were not
albinos and were one of the other possible colors of cream/honey/cremello. The puppies never do get their
pigmentation and the family has a puppy that forever must be guarded from the sun with lots of protection,
i.e. sun block, sunglasses, etc.
The photos below were those forwarded them to us for use on our Boston Terrier Colors Explained pages.
Cypress Farm Kennel and those credited within these pages do not breed Boston Terriers of the Cornaz
Albino coloration.
Nose Color: Pink
Eye Color: Blue/Green
color, or lack there of, for the Boston Terrier breed. Very little is known about the albino gene within any
breed of dog and most of the theories on the gene are just that, with no way to prove them to date. It is
believed that the albino gene, whatever it may be, is within the hypothetical C locus. This locus is said to
cause a double dilution which results in what in the Boston Terrier breed is known as a Cornaz Albino.
Cornaz Albino Boston Terriers are not solid white with red eyes as one would assume an albino would.
Actually, the part of the coat that would be any color that white, is faded to a off-white/tan color. For this
reason, people tend to believe that they are cream and white Boston Terriers. However, the easiest way to
tell the difference between a true cream and white Boston Terrier and a Cornaz Albino is simply
pigmentation. Cornaz albinos have no pigmentation of the nose, eye rims, or paw pads, everything is light
pink. The eyes are between a blue and green hue and are extremely sensitive to sunlight.
Much like honey and white Boston Terriers, Cornaz Albinos are born off-white/tan in appearance. Because
of this there are those that have been duped by unscrupulous breeders saying that the puppies were not
albinos and were one of the other possible colors of cream/honey/cremello. The puppies never do get their
pigmentation and the family has a puppy that forever must be guarded from the sun with lots of protection,
i.e. sun block, sunglasses, etc.
The photos below were those forwarded them to us for use on our Boston Terrier Colors Explained pages.
Cypress Farm Kennel and those credited within these pages do not breed Boston Terriers of the Cornaz
Albino coloration.
Nose Color: Pink
Eye Color: Blue/Green
| Albino Genetically Known As: cch ***These Boston Terriers are NOT Seal and White*** |
- Although Albino Boston Terriers are understood as double dilutes, research suggests that this dilution is
not the same as the D locus dilution. With that, if an albino Boston Terrier is bred with a blue Boston
Terrier, just because the albino is a double dilute does not make it able to produce blue puppies. The
albino must carry a copy of the d/d gene recessively or in the rare event the genes mutate.
- Albinos have been bred with Boston Terriers of varying colors, but to date, there is no documentation
provided that an albino has ever produced a color other than black/brindle/true seal/or albino.
not the same as the D locus dilution. With that, if an albino Boston Terrier is bred with a blue Boston
Terrier, just because the albino is a double dilute does not make it able to produce blue puppies. The
albino must carry a copy of the d/d gene recessively or in the rare event the genes mutate.
- Albinos have been bred with Boston Terriers of varying colors, but to date, there is no documentation
provided that an albino has ever produced a color other than black/brindle/true seal/or albino.
| ***Important Facts To Note About Albino Boston Terriers*** |
| I am ready to move onto Lesson #8: Patterning Please Take Me To Lesson #8 Please Take Me To Color Home |
