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 (black) and phaeomelanin (red/yellow) 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 are awing at first glance. Some people adore their lack of pigment or coloration and
pigment while others aren't too keen of their looks.  There is still so little known about albinos genetically.
Much is postulation but there are some facts that are known. It is postulated that there is a type of albino
gene but that like the B locus there are mutations that cause differing affects to coat and iris. This locus is
postulated to cause a type of "double dilution" which results in lack of pigment and coat color. There are
currently postulated to be two types of albinos within the Boston Terrier breed: Cornaz and Leucism.

Cornaz Albino Boston Terriers are not solid white with red eyes as one would assume an albino would
possess.  Actually, the part of the coat that would be colored say, black, on a traditionally tuxedo clad
Boston Terrier is diluted almost colorless to an off-white color.  For this reason, people tend to believe that
they are cream and white Boston Terriers when they are newly born. By week 3 (sometimes earlier) their
lack of pigment on nose/iris/paw pads would clearly point to albinism. Cornaz Albinos have no pigmentation
of the nose, eye rims, or paw pads. Everything is light pink or flesh toned. The eyes are often a very pale
blue/green hue and are extremely sensitive to sunlight. The same genetics behind the White Doberman are
associated with the odd coloration of a Cornaz Albino Boston Terrier.

Leucistic Albino Boston Terriers are much less common that Cornaz albinos. Where Cornaz albinos seem to
express some type of coloration of markings, Boston Terriers affected with leucism are lacking all pigment
of the coat, being solid white. The pigment of their iris' are also very pink to almost translucent blue at

Health issues are often times a large concern to those when they view an Albino Boston Terrier for the first
time. People worry about their eye sight and hearing abilities as well as protection from the sun. To our
knowledge there has never been an Albino Boston Terrier CAER or BAER tested or OFA certified for
verification of eye sight and deafness. However in speaking to many Albino Boston Terrier owners they
admit that their albino babies do have sensitivity to bright light but also that none of their dogs have
hearing issues. They all apply sunscreen to their babies when planning to be outdoors, some daily every
morning and afternoon. One of the 20+ albinos owned by people I am in communication with does have
allergies common to the breed. None the owners have expressed any health issues with their Albino
Boston Terriers aside from the above.  If you own an Albino Boston Terrier and have some health issues
with your baby or information that you'd like to share please
contact us.

The photos below were those forwarded them to us for use on our
Boston Terriers of Color page on
Facebook.  Cypress Farm Kennel and those credited within these pages do not breed Boston Terriers of
the Cornaz Albino coloration.

Nose Color: Flesh tone/lacking all pigment
Eye Color: Leucistic, pink/translucent    Cornaz, bluish green
Genetically Known As: cch
***These Boston Terriers are NOT Seal and White***
-There is not much known genetically about albinism in the Boston Terrier breed. Animal Genetics is eager
to learn more about the genes that link to produce an albino within the breed. If you own an albino of either
variation above and are interested in your dog being on the forefront of research for the locus/genes
responsible for this lack of color within our breed by submitting DNA for genetic mapping research please
contact us. Information from DNA color panel will be shared. Photos will be required with DNA submission.
DNA is collected by owner, in home, easily with a buccal cheek swab provided free of charge by AG. No vet
visit needed! You only have to pay for return shipping.  
***Important Facts To Note About Albino Boston Terriers***
I am ready to move onto Lesson #8: Patterning
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