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CHOCOLATE ENGLISH & FRENCH BULLDOGS

The hair color on Chocolate bulldog can vary slightly; no matter how hard you try, the LIVER-colored nose of a Choco will always stand out.No, matter if it’s Hershey chocolate or more diluted chocolate like chocolate fawn/sable. The bulldog nose, eyeliner, and pads should all be brown. It’s not an actual chocolate-colored bulldog if the nose isn’t brown. A dog with a chocolate color is simply a diluted black dog. Contrary to popular belief, the Chocolate bb (Brown/Liver) gene does not produce chocolate bulldogs. It’s a gene that dilutes black to brown, making it less noticeable. The BLACK base must be present to weaken the Chocolate Gene to produce a dark chocolate bulldog if it so desires. It’s common for the eyes to be a shade of gold, green, blue, or gray. The “bb” alleles in CHOCOLATE bulldogs can be discovered through DNA Color testing. Each bulldog offspring inherits one of the dilution factor genes from each of their bulldog parent, which can be either a brown gene (b) or a non-brown gene (B). Brown (b) is the only gene that chocolate parents (bb) can contribute, a non-brown (B) or a brown (b) gene. Please check out the official rare color chart for more information.

CHOCOLATE

Genotype for Chocolate bulldog Gene: [bb] 

Overview:Overview: Unlike blue Bulldogs, chocolate Bulldogs are not purebred black dogs. If the seal gene isn’t involved, the coat will have a different undertone and be shiny and brown when exposed to black objects or the sun. When the hair is rubbed backward, these bulldogs may or may not have a fawn undercoat. Nose, footpads, and eyeliner in the chocolate fawn always have a chocolate color.

Brown aka Chocolate

BB, Bb, bb

TYRP1 Gene. There are two alleles 1. B dominant whole base color 2. b recessive brown

TYRP1 modifies eumelanin and does not act as a dilution gene as in blue(dd). The dilution gene affects the pigment density, making it appear pale as if you mixed white into black paint, making it gray. Instead of diluting, the chocolate bb changes the shape of pigment molecules. Different forms reflect light in another way, which causes the black to turn into chocolate.

When you have a bb bulldog, black pigment is genetically modified to chocolate bulldog color. However, if your bulldog is red or yellow base, the bb does not alter the hair color but does modify nose, eye rims, and footpads from black to chocolate and eye color to amber or gold.

RESULTS (UCDavis)

BB: It’s impossible to have chocolate offspring, full base color, cannot have chocolate offspring

Bb: A copy of chocolate is found in the base color of the bulldog.

bb: 2 copies of chocolate, full chocolate

 

Detail Bulldog Chocolates’ hair color

Even though Chocolates’ hair color can vary slightly, it’s impossible to ignore the LIVER-Coated nose. Regardless of whether it’s a Hershey-type chocolate color bulldog or a more light chocolate bulldog color, the nose, eyeliner, and pads should all be brown. It’s not a true chocolate bulldog if the nose isn’t brown (liver). Chocolate color in french bulldogs or English bulldogs is a modified Black bulldog, where black is modified to chocolate. The Full Black base must be present for the Chocolate Gene to produce a dark chocolate bulldog color.

Only black pigment is affected by the chocolate gene. A bulldog’s black hairs will turn to chocolate if they are bb. This bb gene covers all possible pattens. The gene usually changes the color of the bulldog’s nose and eyes for chocolate, typically yellow, amber, or gold. The best way to tell a chocolate color bulldog from a black or blue is by the color of its nose. When you combine a chocolate bulldog parent with a blue bulldog parent, bb + dd, you get a lilac, which is the color of a Weimaraner.

Chocolate color Recessed genes require two copies to manifest in a bulldog. If a dog has a full black base coat and is bb, the black will turn chocolate on the dog. Both Bb and BB appear to have no effect whatsoever.

As if this wasn’t confusing enough, I did learn that the b genotype is composed of three distinct sequences. Various b allele variations exist, but they all produce the same coat hue. These variations mean you can have either b, b2, or b3 on your dog’s DNA. This variation can be on one or both sides of the complete gene.

Therefore, it is possible to have your bulldog DNA any one of the following types:
Bb Bb2 Bb3 bb bb2 bb3 b2b b2b2 b2b3 b3b b3b2 b3b3

All three sequences are recognized by some labs, while others don’t, which means that you may not know that your dog has b2 or b3.

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