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The Fun Mouse: Varieties Introduction: Self Colors

* Click pictures to see them larger.

Contents:


BlackLab name: Non-agouti
Fancier name: Black
Genotype: a/a
Chromosome: 2
Originated: Spontaneous mutation (however, it has since been made by chemical induction (ethylene oxide) and radiation)
Show class: Black
General description: Jet black with dark eyes. They have yellow hairs in their ears, around genitals, nipples, and base of the tail. A majority of the yellow hairs fall out when the adult coat comes in yet some remain.

Extreme BlackLab name: Extreme non-agouti
Fancier name: Extreme black
Genotype: ae/ae
Chromosome: 2
Originated: Spontaneous mutation (mutation was found among descendants of an irradiated mouse).
Show class: Black
General description: Jet black with dark eyes. Extreme black mice lack redness coat color that black mice tend to have. They also completely lack yellow hairs in their ears, around genitals, nipples, and base of the tail.

Black/Extreme Black Comparison
Front view comparison of Extreme black and black.
Click pic to see it larger.
Extreme Black

Rear view comparison of Extreme black and black.
Click pic to see it larger.
Extreme Black

ChocolateLab name: (non-agouti) Brown and/or Cordovan
Fancier name: Chocolate
Genotype: a/a b/b, a/a bc/bc, and a/a bc/b.
Chromosome: bc Cordovan and b Brown are on chromosome 4.
Originated: Brown was a Point mutation. Depending on strain, this mutation was due to radiation, chemical induction, or spontaneous mutation. Cordovan was a spontaneous mutation.
Show class: Chocolate
General description: Dark, rich brown with brown eyes.

It is easier to make a deep rich chocolate using Cordovan than Brown. However, Brown can still give a beautifully deep brown color.

Mock ChocolateFancier name: Mock Chocolate
Genotype: a/a cch/ce
Show class: Chocolate
General Description: Dark brown with brown eyes. It can be hard, if not impossible, to visually tell the difference between Mock Chocolate and Chocolate.

Light Mock ChocolateFancier name: Light Mock Chocolate
Genotype: a/a cch/c
Show class: Chocolate (however, these mice generally will not do good in show as their color is too light).
General description: Light brown with dark eyes.

ChampagneFancier name: Champagne
Genotype: a/a b/b p/p
Show class: Champagne
General description: Light brown with a pink tint. Pink eyes

CoffeeLab name: (non-agouti) Extreme Dilution
Fancier name: Coffee
Genotype: a/a ce/ce
Chromosome: Extreme Dilution ce is on chromosome 7.
Originated: Extreme Dilution was found in the wild. (Spontaneous mutation)
Show class: Chocolate (however, these mice generally will not do good in show as their color is too light).
(yes, this mouse has the same genotype as Beige. The variety depends on the intensity- how light or dark the mouse is)
General description: Soft brown with dark eyes.

BeigeLab name: (non-agouti) Extreme Dilution
Fancier name: Beige
Genotype: a/a ce/ce
Chromosome: Extreme Dilution ce is on chromosome 7.
Originated: Extreme Dilution was found in the wild. (Spontaneous mutation)
Show class:
(yes, this mouse has the same genotype as Coffee. The variety depends on the intensity- how light or dark the mouse is)
General description: Off white, tan-ish with dark eyes.

LilacFancier name: Lilac (US) (UK Dove)
Genotype: a/a p/p
Show class: Lilac (US)
General description:Light blue with a pink tint to the coat. Pink eyes. Lilac's can vary in shade from the mouse you see here to very Silver looking.

Blue*Note: this description is a combination of 2 different genes, fitting the same variety.
Lab name: (non-agouti) Dilute | Leaden
Fancier name: Blue
Genotype: a/a d/d (Dilute) | a/a ln/ln (Leaden)
Chromosome: Dilute: chromosome 9. Leaden: chromosome 1.
Originated: Dilute: Very old mutation first caused by insertion of an ecotropic murine leukemia virus. All other mutations lack the virus. Leaden: Spontaneous mutation (Point mutation)
Show class: Blue
General description: Dark slate blue with dark eyes.
Blue
There are several ways to tell the difference between Leaden and Dilute. The most obvious of ways is that Leaden is epistatic to recessive yellow e/e, whereas Dilute is not. Additionally, when Leaden is present with other modifying genes on different loci, they often have a lighter phenotype than Dilute does when combined with the same modifying genes.

SilverFancier name: Silver
Genotype: a/a d/d p/p
Show class: Silver
General description: Light silver-gray, much like chrome, with pink eyes.

DoveFancier name: Dove (US) (UK Lilac)
Genotype: a/a b/b d/d
Show class: Dove (US)
General description: An even mix of blue and chocolate with dark eyes.Dove

No PictureFancier name: Lavender
Genotype: a/a b/b d/d p/p
Show class: Lavender
General description: Lavender is a mix between Champagne and Silver. Pink eyes.

Note: The mouse pictured here should ideally have more silver tones to her. Non-satins don't show silver tones as well as satins. Roan also bleaches the color a little, making her a bit light. She is lavender though, but to the light end of the variety. She's from a litter consisting of black, blue, chocolate, champagne, lilac, dove (such as the dove roan above), and lavender (litter of 12).

Recessive YellowLab name: (non-agouti) Recessive Yellow
Fancier name: Recessive Yellow (RY)
Genotype: a/a e/e
Chromosome: recessive yellow is on chromosome 8
Originated: Spontaneous mutation. This mutation is a frameshift caused by a deletion of one nucleotide.
Show class: Gold, Fawn, Orange, or Red depending on shade of coat and eye color.
General description: These mice can come in any number of yellow shades ranging from flame red, light blond, and even dark sable-looking. Their appearance can be hard to tell apart from Lethal Yellow. However, recessive yellow mice are very different genetically. In youth, recessive yellow mice are usually sooty, having uneven color, often with dark ticking (often being more prevalent over the rump). This usually goes away with their adult coat.

Recessive Yellow mice can have any color eyes. Pink eyed recessive yellow mice tend to be more flame red while dark eyed recessive yellow mice tend to be more blond or "sable" in appearance.

Recessive Yellow is often referred to as "The safe Yellow" (as opposed to Lethal Yellow). Recessive Yellow is capable of giving you the same varieties (and more, actually) that Lethal yellow can, yet Recessive Yellow doesn't have any of the problems Lethal Yellow is notoriously susceptible to.

Recessive Yellow, when combind with spotting genes, causes reduced white spotting.

Recessive Yellow Recessive Yellow Recessive Yellow Recessive Yellow

YellowLab name: Yellow
Fancier name: Lethal Yellow, Fawn, Red, Orange.
Genotype: AY/* Note that AY/AY is lethal.
Chromosome: 2
Originated: Old mutation originating from non-commercial fanciers.
Show class: Red, Fawn, Orange depending on shade.
General description: Much like Recessie yellow, Lethal yellow cna come in a wide range of colors, therefor they can be shown in a wide range of classes. Always refer to your local club for show standards.

Lethal Yellow, when combind with spotting genes, causes reduced white spotting.
Yellow
Health: Lethal Yellow mice are more susceptible to an array of health abnormalities. They are models for Diabetes because of their abnormal insulin levels. They have a higher instance of food allergies than most other varieties. They are also prone to obesity, which leads to many other health problems. Weight gain generally starts after 10 weeks of age. Even with an adjusted diet and increased exercise it's hard, if not impossible in many cases, to control their weight. Weight gain causes low fertility, therefore breeders tend to breed females younger than they may breed other varieties (but still not before acceptable breeding age). These mice are also far more susceptible to tumors. Note that this does NOT mean that all Lethal Yellow mice will have these problems. These mice just need to be thoroughly screened for health problems. Careful breeding needs to be done. It is not recommended to obtain a Lethal Yellow mouse from anywhere other than a *good* breeder, even if you don't intend to breed.

CreamFancier name: Cream
Genotype: AY/* cch/cch OR Ay/* b/b d/d OR a/a ce/c, among other genotypes.
Show class: Cream
(yes, ce/c is also BEW/Bone. The variety depends on the shade )
General description: Cream mice are very light creamy-yellow color. Dark eyes

PEWLab name: Albino (c/c)
Fancier name: PEW (Pink Eye White) or Albino (depending on genotype)
Genotype: c/c (note: There are *several* ways to make PEW! but albino is always c/c)
Chromosome: 7
Originated: Very old spontaneous mutation dating back to Greek and Roman times. (Point mutation)
Show class: PEW
General description: pure white with pink eyes

BEWFancier name: BEW
Genotype: There are *many* ways to make a BEW.
1) ce/c with any dark eyed mouse.
2) A Yellow mouse (be it Recessive Yellow e/e, Lethal Yellow Ay, or under marked viable yellow Avy) combined with many different c-dilutes.
3) A combination of spotting genes used together (such as pied and variegated s/s W/*, among many others) will sometimes make a mouse with one big white spot consuming the entire body, causing BEW. Sometimes a single spotting gene will cause BEW, though rare.
Show class: BEW
General description: Pure white coat with dark eyes.
BEW
Contrary to popular belief, BEW mice do NOT have black eyes, no matter the color of the mouse. Most mice actually have brown eyes. Do not shine bright light into your mouses eye to see their eye color. Doing so is not good for their eyes. The picture on the left just happened to come up in a standard picture taken of a BEW mouse. The picture is zoomed in drastically (as you can tell from the graininess), so you can see the color. The camera wasn't very close to the mouse. The light in the room that this picture was taken was a standard lit room.

REWLab name: Ruby-eyed (this is Ruby Eyes only, not coat color)
Fancier name: REW
Genotype: ru/ru is one of the many genotypes for ruby eyes. This has little to do with the white coat, however. Ruby eyes will dilute the coat, but not to an extreme. The white coat is likely due to c-dilutes (with ruby eyes diluting the coat further to white) or excessive spotting.
Chromosome: There are many ruby eye alleles on several different chromosomes. Additional explanation (other than the note below) to come in the future.
Originated: Spontaneous mutation found in silver piebald stock.
Show class: REW (Ruby Eye White)
General description: Pure white coat with deep ruby eyes. Not to be confused with BEW. Eye color is best seen in good lighting.

Note: There are many theories about ruby eyes. Some feel it is ru/ru (note that there are many ru alleles on different chromosomes) while others feel it is a pink eye modifier (pr/pr). Some feel it is completely contributed to the c-locus, be it cr/cr or that a REW is an over spotted siamese (i.e. resulting from ch/ch and spots which consume the body, such as that of a BEW). Some feel it is completely unknown in the mouse community all together.

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