Search results
Results From The WOW.Com Content Network
This Thoroughbred stallion (W2/+) has one form of dominant white.His skin, hooves, and coat lack pigment cells, giving him a pink-skinned white coat. Dominant white (W) [1] [2] is a group of genetically related coat color alleles on the KIT gene of the horse, best known for producing an all-white coat, but also able to produce various forms of white spotting, as well as bold white markings.
White spotting can take many forms, from a small spot of white to the mostly-white pattern of the Turkish Van, while epistatic white produces a fully white cat (solid or self white). The KIT gene W locus has the following alleles: [25] [26] [27] W D (or W)=dominant white (solid/self white), autosomal dominant allele. It causes complete white ...
Dominant white (W) is a large group of alleles best known for producing pink-skinned all-white horses with brown eyes, though some dominant white horses have residual pigment along the topline. Some W alleles produce white spotting on horses with a predominately dark coat.
The vast majority of so-called "white" horses are actually grays with a fully white hair coat. A truly white horse occurs one of two ways: either by inheriting one copy of a dominant white ("W") allele that produces white when heterozygous but may be a genetic lethal if homozygous, or by inheriting two copies of a non-lethal dominant white ("W ...
True white coat coloring can be produced by at least half a dozen known genes, and some are associated with health defects. Some genes which encode a white or near-white coat when heterozygous, popularly called "dominant white," may be lethal in homozygote embryos. [10]
Because several dominant white alleles produce sabino-style patterns rather than completely white horses, some propose the W gene be called the “white spotting” gene. In some cases, a horse that is homozygous for the SB-1 gene is often called “sabino-white,” some researchers prefer the term "maximum sabino" rather than "sabino-white" to ...
Nearly all-white coat at birth, blue eyes, DNA testing, observation for colic, no meconium, pain: Differential diagnosis: Heterozygotes have no known health issues related to the frame allele. Cremello, Dominant white and Sabino-white are normal white or near-white coat colors for healthy horses. Can be distinguished by genetic testing.
The associated coat colors were assigned to the Dun locus in 1974 by Stefan Adalsteinsson, separate from Cream, with the presence of dun dilution indicated by the dominant D allele. [21] The dominant D allele is relatively rare compared to the alternative d allele, and for this reason, the dominant allele is often treated as a mutation. However ...