E Locus
Lesson #5 will be based on the E Locus. The E Locus attained it's name from the word Extension.
Cream and White Boston Terriers, sometimes known as blond and white or tan and white, can be shocking to see born
because often times they are born without color or are very pale in cream coloration. For this reason when first born those
breeders not educated on hues of cream Boston Terriers can incorrectly, and prematurely, determine them to be either solid
white or albino.

Though born solid white, as with all other colors of Boston Terriers, creams darken with age. As adults creams range in color
from almost pure white/very pale cream to a medium cream/tan hue of cream.  The cream color is based on the E locus and
there is absolutely no black hairs within the coat of a cream Boston Terrier. There is also no melanistic masking on a cream
Boston Terrier also helping to show the distinction between cream/white and fawn/white.  

Boston Terriers of the cream color also have oddly colored pigment of the nose. Upon first glance of your "typical" cream
Boston the nose pigment almost seems grey, but this is because most creams have pigment on the nose that resembles a
washed out appearance. It almost looks as though the nose has been dabbed black with a sponge.  It is unknown genetically
what causes this odd coloring.  It is known that supplementing with dried sea kelp can help to darken the pigment on the
nose to a more solid black appearance if so desired. There have been creams produced that have red pigmentation as well.
These red pigmented creams often times have iris coloring that is hazel/amber brown.

Nose Color: Black
Eye Color: Dark Brown
Cream and White
Genetically Known As:  e/e
***These Boston Terriers are NOT Seal and White***
I am ready to move onto Lesson #6: D Locus
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- Many people assume that cream Boston Terriers are a dilute, but this is incorrect. For a Boston Terrier to be cream, only the E locus is
known to be affected with recessives (e/e, D/D). However, it is genetically possible for cream Bostons to be diluted. When this happens
the genetic coding would be (e/e, d/d).  This dilution would affect the black pigmented cream causing pigment and coat color to be diluted
like a blue Boston Terrier. The diluted cream would have dilute iris and nose pigment characteristics and a lighter cream coat, not white. If
the cream is a red pigmented cream with two copies of dilute added it would become a dilute brown or lilac pigmented cream. The genetic
terminology as assigned by genetics labs like Animal Genetics, Inc and VetGen refer to the dilute black creams as champagne and white
(not to be confused with the slang term for lilac as we are speaking of two different coat colorations). True Champagne Boston Terriers
are of the minority in the cream hue, BUT NOT RARE.
***Important Facts To Note About Cream Boston Terriers***
Be sure to scroll to the bottom of the page
to learn about CHAMPAGNE Boston Terriers!