| A Locus |
| Lesson #4 will be based on the A Locus. The A Locus attained it's name from the word Agouti. |
Fawn and White Boston Terriers, sometimes known as Sable, are one of the two most complex colors of the
Boston Terrier rainbow, the other being seal. There are multiple color genes responsible for the coloring
of a fawn Boston Terrier. Perhaps the most infamous of the colors as most poorly bred fawns are likened to
Boxers and are assumed as being mix breeds.
Like all colors of Boston Terriers, fawns are no different. There are many varying shades of fawn, from
extremely light base fawn to a rich/vibrant red base fawn coloring. The most distinct attribute that fawn's
posses, is their masking and banding of black hairs throughout their coat. As with the varying hues of fawn
color there is also varying degrees of black on all different shades of fawn. There are fawns with minimal
masking and minimal banding and can also be found with a heavy degree of black throughout their coat.
But one thing is certain, FAWNS ALWAYS HAVE MASKING.
The best way to describe a fawns coat is a fawn base color with intermingled black hairs, as well as hairs
that are "banded" being fawn at the base and black at the tip which may seem almost as a reverse seal
(black base with reddish tinted banding at the tip). Puppies are sometimes born with so much banding and
black hair that they appear brindle until a couple of days or even weeks later.
All fawns have a visible and distinct melanistic mask, genetically coded as Em. The black mask is formed as
an interaction between the MC1R or E gene with the agouti protein and melanocyte stimulating hormone.
It is very important to note that melanistic masks can be found in colors other than black, including, brown
and grey.
Nose Color: Black
Eye Color: Dark Brown
Boston Terrier rainbow, the other being seal. There are multiple color genes responsible for the coloring
of a fawn Boston Terrier. Perhaps the most infamous of the colors as most poorly bred fawns are likened to
Boxers and are assumed as being mix breeds.
Like all colors of Boston Terriers, fawns are no different. There are many varying shades of fawn, from
extremely light base fawn to a rich/vibrant red base fawn coloring. The most distinct attribute that fawn's
posses, is their masking and banding of black hairs throughout their coat. As with the varying hues of fawn
color there is also varying degrees of black on all different shades of fawn. There are fawns with minimal
masking and minimal banding and can also be found with a heavy degree of black throughout their coat.
But one thing is certain, FAWNS ALWAYS HAVE MASKING.
The best way to describe a fawns coat is a fawn base color with intermingled black hairs, as well as hairs
that are "banded" being fawn at the base and black at the tip which may seem almost as a reverse seal
(black base with reddish tinted banding at the tip). Puppies are sometimes born with so much banding and
black hair that they appear brindle until a couple of days or even weeks later.
All fawns have a visible and distinct melanistic mask, genetically coded as Em. The black mask is formed as
an interaction between the MC1R or E gene with the agouti protein and melanocyte stimulating hormone.
It is very important to note that melanistic masks can be found in colors other than black, including, brown
and grey.
Nose Color: Black
Eye Color: Dark Brown
| Fawn and White Genetically Known As: K/K, a/y a/y, Em ***These Boston Terriers are NOT Seal and White*** |
-The predominant pigmentation of fawns is black however there have been instances of red
fawns/chocolate fawns with self colored pigment and brown masking, these instances have been severely
limited.
fawns/chocolate fawns with self colored pigment and brown masking, these instances have been severely
limited.
| ***Important Facts To Note About Fawn Boston Terriers*** |
| I am ready to move onto Lesson #5: E Locus Please Take Me To Lesson #5 Please Take Me To Color Home |
