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Topic: Dilution gene

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	Dun gene - Wikipedia, the free encyclopedia
		The dun gene is one of the dilution genes that affects both red and fl pigments in a horse's coat color.
		Unlike the silver dapple gene (which works only on fl-based coats) or the creme gene (which works on red-based coats), it has the ability to affect the appearance of all fl, bay, or chestnut (red) based horses to some degree.
		The dun gene does not change the horse's appearance when two copies of the gene are present (one from each parent.) The gene only does this when one copy is present.
	en.wikipedia.org /wiki/Dun_gene (471 words)

	[No title]
		This gene is the wild-type gene present in the mallard and the Rouen breed.
		Since the blue and brown dilution genes act on the fl pigment (eumelanin) it is important to their expression that there be some fl pigment.
		gene is the lack of the recessive brown dilution genetic factor, which is also the gene possessed by the wild-type (mallard) fowl.
	marsa_sellers.tripod.com /geneticspages/page6.html (1573 words)

	EC Encyclopedia: Dilutions
		Dilutions are a group of geenes that "dilute" or lighten the hair and sometimes the skin color.
		The creme dilution is denoted by a Cr for dominant and a cr for recessive.
		The dun dilution gene is denoted by D for dominant and d for recessive.
	www.angelfire.com /co4/ecnew/ref/color/dillutions.html (455 words)

	[No title]
		Both dilution genes need to be present to affect the color of the dog.
		The Albino gene, also called a "masking gene", is totally unrelated to the color (BB, bb, or Bb) genes or the dilution (DD, dd or Dd) genes that we discussed earlier.
		This mutated recessive gene, called (c), greatly reduces the number of pigment granules in hair, skin and eyes, giving these Dobermans the appearance of a light cream based coat with white markings and translucent blue eyes and pink noses, eye rims, and foot pads.
	www.dobequest.org /genotype.php?DOBEQUEST=f5e802c8b4dadc6af8d2b4d5bc00731e (1408 words)

	Dilute Brown [Fawn] (Site not responding. Last check: 2007-10-22)
		The dilution gene is found on the "D" Locus.
		The coloration is achieved by breeding together dogs that carry the dilution gene either in it's homozygous or heterozygous form; ("D/d" or "d/d") and the chocolate gene ("B/b" or "b/b").
		He is a dull color, caused by the flattening of the brown (b/b) gene by the dilution gene (d/d).
	www.kelpies.caviesrule.com /photo3.html (461 words)

	[No title] (Site not responding. Last check: 2007-10-22)
		So strong is the relation between the "dun" dilution and "primitive" markings, that these markings are now commonly called "dun factor" markings, and some registries have begun to use the presence or absence of striping as a means to try and distinguish between the different dilution genes.
		In horses, the "D" gene is dominant instead of recessive, and the dilution is not uniform, as the points are unaffected and remain the base color of the horse.
		In some countries "dun" is still the term for any dilute horse (regardless of which dilution gene it comes from), and in the USA the terms "dun" and "buckskin" were used almost interchangeably for a similar colored horse prior to 1987 or so.
	www.members.aol.com /battyatty/dunfoal.htm (1968 words)

	Dilute Aussies
		The eyes of a dilute are usually somewhat lighter than those of non dilute pups in the same litter.
		If not for the dilution gene he would be a fl bi, so the term here would be "blue bi".
		Her liver coat is diluted to the color of a Weimaraner or "fawn" Dobe, though many red dilutes are much lighter in shade.
	www.ashgi.org /color/dilute_aussies.htm (859 words)

	Justamere Ranch -- Dun vs. Buckskin
		Buckskin is one result of the "c cr" dilution gene, while dun is one result of the "dun" dilution.
		If both parents have one copy of a dilution gene then the resulting foal has a 25% chance of not carrying the dilution gene, a 50% chance of carrying one copy of the dilution gene, and a 25% chance of carrying two copies of the dilution gene.
		A horse that is homozygous for the "dun" dilution gene looks the same as a horse that only carries only one copy of the gene.
	www.justamere.com /newsletter/color.asp (1192 words)

	The Creme Dilution Gene in Horse Colors
		The Cream dilution gene is present at the Albino locus.
		As with Palominos it is possible for the Cream gene and the Dun gene to occur on the same horse, this is called "Dunskin".
		A chestnut with the cream gene is a palomino, a bay with the cream gene is a buckskin, but a fl with the cream gene can appear to be fl although it is actually a smoky fl.
	www.equine-information.com /creme.html (1811 words)

	AGA Resources
		The dilution gene causes fl color to dilute to gray (in a range from dark to light) and red color to dilute to gold.
		Since the gene for dilution is dominant to the gene for non-dilution, an animal that has one gene for dilution and one for non-dilution will have a diluted color.
		Additionally, due to the effects of the modifier gene believed to be at work in Hereford cattle or cattle upgraded from Here-ford, there is often no way to tell by looking if a red animal carries the dilution gene.
	www.gelbvieh.org /color_factsheet.htm (1178 words)

	Dilution - Wikipedia, the free encyclopedia
		Dilution (equation), an equation to calculate the rate a gas dilutes
		Trademark dilution, a type of unlawful trademark use outside of the relevant market
		Dilution gene, a gene that lightens the coat color of certain living things
	en.wikipedia.org /wiki/Dilution (115 words)

	[No title] (Site not responding. Last check: 2007-10-22)
		This gene primarily affects red pigment (changing it to a gold color) and has very little, if any, effect on fl pigment in a single dose, which is why the points on a buckskin stay fl and are not diluted.
		Believed to correspond to the "C" locus dilutions in other animals, the "c cr" dilution would act to reduce the amount of pigment by a reduction in the number, size, shape, and distribution of pigment granules in the hair, probably by a chemical process that interferes with the activity of tyrosinase necessary for pigmentation.
		In horses, the "cream" dilution is an incompletely dominant gene, which means the amount of dilution depends on whether the horse carries one (single dose, heterozygous) or two (double dose, homozygous) copies of the gene.
	members.aol.com /battyatty/sooty.htm (1072 words)

	Equine Colour by Whoa Horse Web Design (Site not responding. Last check: 2007-10-22)
		The Creme gene, (Cr), (otherwise known as a dilution gene), can only be received in one or two copies, and will lighten the horse's base color accordingly.
		Double dilutes will always contribute one Creme gene to their offspring (however, for the offspring to be homozygous, the other parent must also contribute a Creme gene to the offspring).
		Dun is another dilution gene, but it is not a Creme gene dilution nor is it associated with the Creme gene, although some Duns DO carry both the Dun Factor gene and the Creme gene (Dunalinos and Dunskins, as well as some Cremellos and Perlinos).
	www.equinecolour.com /karenspage.htm (648 words)

	Coat Color Genetics
		This gene and the gene G, to be discussed in the next section, will be presented first because they have alleles whose actions can obscure the actions of the other coat color genes.
		The gene that controls the distribution pattern of fl hair is known as A. The allele A in combination with E will confine the fl hair to the points to produce a bay (Fig.
		Second, in addition to pigment dilution, a predominant characteristic of the allele D is the presence of a particular pattern which includes dark points, dorsal stripe (list), shoulder stripe and leg barring.
	www.vgl.ucdavis.edu /~lvmillon/coatcolor/coatclr3.html (3980 words)

	CPArticle9
		We call them "dilution" genes because of the overall effect they have on a base coat color is to "dilute" or lighten that color.
		Dilution genes previously discussed were the Cream gene (Article #1) which is responsible for the palominos, buckskins, smokey fls, and when in homozygous form, the cremellos, perlinos and smokey creams.
		Dun is a dominant gene, this means for a horse to be dun, it must have at least one dun parent.
	www.mfthba.com /ColorPanel/cparticle9.htm (1526 words)

	Champange and Creme Dilution Genes
		The dilution genes include the creme gene, the dun gene, the silver dapple gene, and the champagne gene.
		A fl horse with the creme dilution gene (smokey fl) most often looks the same as a non-dilute fl horse, though ocassionally a smokey fl will look like a sun-burnt fl horse with areas of chocolate brown and the eyes may be a bit lighter.
		THE GENETICS: The creme dilution gene and the champagne dilution gene are DOMINANT genes, so they must be present in the dam or sire's physical appearance to be passed on to offspring - with the exception of a fl horse with the creme gene (smokey fl).
	www.brownridgefarm.com /champagne_creme.htm (1269 words)

	WHAT COLOR IS YOUR HORSE
		Two characteristics of a dominant gene are if the horse carries the gene he or she will display the color, and to produce a foals of that color one parent must display the gene.
		Since it is a dominant gene a silver dapple will pass the gene on to its offspring 50% of the time but one never knows when that 50% will kick in.
		The smutty/sooty gene is very common in some lines of Missouri Foxtrotters and can look like the silver dapple coloring, to the point that even horse color experts are not able to distinguish between the two.
	www.mfthba.com /ColorPanel/CPArticle4.htm (1580 words)

	Horse Tests - Coat Color
		Among those, the gene responsible for the frame-overo pattern is associated with a lethal disease of newborn foals called overo lethal white foal syndrome.
		Chestnut is diluted to palomino; bay is diluted to buckskin and fl is diluted to smoky fl.
		The gene appears to be associated with horses often characterized as "frame-overos" in Paints and Thoroughbreds, but is also present in some tobiano/overos, some solid-colored (breeding stock Paint) offspring from overo matings, some tobianos and Quarter Horses without obvious evidence of the overo pattern.
	www.vgl.ucdavis.edu /service/horse/coatcolor.html (1781 words)

	Color Genetics in Simmental Cattle (Site not responding. Last check: 2007-10-22)
		Due to buyer discrimination against diluted color-pattern cattle, the market value of the diluted animals (especially as calves or yearlings) may be reduced.
		Because this dilution gene is dominant to the non-dilute gene, all cattle that are actually fl haired CANNOT possess this dilution gene.
		Therefore, determining the presence or absence of the dilution gene in RED cattle is NOT possible by simple visual appraisal.
	www.ackermans-cottonwood.com /Non-Dilute.htm (312 words)

	Silver Dapple Gene
		The silver dapple gene is a dominant gene that lightens the body color slightly, often (but not always) producing dapples on the body and legs.
		The effect of the silver dapple gene is most striking on a fl horse, where the body color is diluted to a chocolate and the mane and tail are lightened to a silvery blonde.
		His sire is a cremello, which guarantees that he carries the creme dilution gene, and his chocolate body with blonde mane and tail confirm the presence of the silver dapple gene.
	www.brownridgefarm.com /silverdapple.htm (848 words)

	Dilution of Dog Coat Colors (Site not responding. Last check: 2007-10-22)
		The dilution of the tan is much less noticeable than the dilution of fl, both both eumelanin and phaeomelanin are affected in dogs of "d/d" genotype.
		In mice, this gene dilutes fl coat color to slaty grey and another name for the gene is therefore "slaty".
		He suggested that this could be a dilution gene but it is not like the Weimaraner dilution gene, which causes pups to be born a diluted color and remain so.
	sask.usask.ca /~schmutz/dilutions.html (1807 words)

	Color Genetics
		One copy of the dilution gene allows for the horses basic color of chestnut or bay to be lighted to a palomino or buckskin, respectively, and these horses have just one copy of the dilution gene "Cr+, -".
		In the case of Chip, one dominant dilution gene is donated to 50% of the gamates (sperm), as well as, the other 50% of the gamates (sperm).
		Those stallions only have one copy of the dilute gene present on the dilute locus, the other gene is a recessive, nondiluting gene.
	www.lattefarms.com /colorgenetics.html (2398 words)

	The Cremello Society - Colour Chart
		A sorrel/chestnut horse that recieved one copy of the cream dilition gene from one of its parents, giving it a coat ranging in color from pale cream, to golden, to chocolate and has a white mane and tail.
		A Bay horse that recieved one copy of the cream dilution gene from one of its parents, giving it a diluted hair coat (the color can range from very pale cream, to gold, to a dark "smutty" color,) and has fl "points".
		A Bay horse that recieved one copy of the cream gene from both of its parents, and has pink skin, blue eyes, a cream to white colored coat and a darker mane and tail (often orange or red tinted).
	www.cremello.co.uk /chart.htm (272 words)

	Prince Moon Beam, foxtrotter, cremello, stallion, Texas, palomino, buckskin
		His are due to the fact that he carries TWO copies of the dilution gene, the gene that makes palomino, buckskin and smokey, but he only can only pass on ONE copy, and one copy does NOT make eyes blue.
		Moon is a Double Dilute, which means he recieved one cream dilution gene from his palomino dam and one cream dilution gene from his palomino sire.
		It also means that Moon is homozygous for the cream gene that creates palomino and buckskin, and he ALWAYS gives one cream dilution gene.
	www.foxtrotexas.com /FullMoon.html (245 words)

	ADHA & NADHR Coat Colors (Site not responding. Last check: 2007-10-22)
		The D gene dilutes the coat color in such a way that it is often confused with the C
		This gene is not recessive, therefore in order for a horse to be a variation of Dun if must have at least one parent that is also a variation of Dun, and a horse can not be a carrier of D without being a variation of Dun.
		Diluted body color of yellowish or gold; mane and tail are fl or brown; has dorsal stripe and usually zebra stripes on legs and transverse stripe over withers.
	www.nadhr.com /Colors.html (688 words)

	Coloration of Texas Longhorn Cattle, Part 2
		The allele dn is incompletely recessive to the wild-type allele for this gene (Dn+).
		The table shows the possible genotypes of eggs produced from the dam, and of sperm produced by the bull, assuming that all three genes are independent of one another (i.e., on separate chromosomes).
		There is not yet a commercial test for the Dilution gene, although progress in the cattle genome project should make a test practical before long.So, if you really like grulla coloration, you can have all grulla calves by selecting the right bull.
	home.austin.rr.com /doublehelix/colorPart2.html (1914 words)

	Coat Color Genetics In Dobermans
		Because dilution is a recessive trait, having the effect of lightening the color of fls and reds, 2 of these recessive genes must be present in order to express visible influence.
		Homozygous means that the 2 genes of the gene pair match, as in BB or bb.
		A Dobe with the gene pair Ww is white-factored.
	home.alltel.net /workdobe/colorgen.htm (1114 words)

	Champagne Colors
		About: Champagne color is a simple dominate dilution gene, dominant means, if a horse carries the gene, it will show characteristics and its own identity is separate from the creme dilutes that create palominos, buckskins and smokey fl.
		Champagne gene acting on one or two genes on the chestnut, or sorrel, base color.
		The genes are called crème genes, which makes the horse's base color one, or two, shades lighter depending whether one or two genes are inherited.
	www.thundervalleywalkers.com /puffchampagnes.html (859 words)

	CPEA Cremellos and Perlinos Explained
		A sorrel/chestnut horse that recieved one copy of the creme dilition gene from one of its parents, giving it a coat ranging in color from pale cream to golden to chocolate and has a white mane and tail.
		A Bay horse that recieved one copy of the creme dilution gene from one of its parents, giving it a diluted hair coat (the color can range from very pale cream, to gold, to a dark "smutty" color,) and has fl "points".
		In colors where the fl gene or the bay gene is present, the possibility of heterozygosity (mixed) is assumed.
	www.doubledilute.com /printablecolorchart.htm (660 words)

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