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Whether a horse visually appears to have the frame pattern or not, testing horses of frame or "overo" lineage is highly recommended. The statistical likelihood of producing a living, frame-patterned foal by crossing two frames is 50%, the same odds of producing a living, frame-patterned foal from a frame-to-nonframe breeding which carries no ...
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E. Eastern equine encephalitis; Endometrosis; Epizootic lymphangitis; Equid alphaherpesvirus 4; Equid gammaherpesvirus 2; Equid gammaherpesvirus 5; Equine atypical myopathy
An equine melanoma is a tumor that results from the abnormal growth of melanocytes in horses. Unlike in humans, melanomas in horses are not thought to be caused by exposure to ultraviolet light. [1] Melanomas are the third most common type of skin cancer in horses, with sarcoids being the first most prevalent and squamous-cell carcinoma being ...
SW1 is the most common known variant. It is incomplete dominant, meaning it has different effects depending on whether one copy or two copies are present. Horses heterozygous for SW1 (one copy) may have a minimal splash pattern, or may be completely solid. Horses homozygous for SW1 (two copies) have the more extensive classic splashed white ...
Gray horses over 6-years-old are especially prone to developing melanoma. [24] The prevalence of melanoma in gray horses over 15 years old [25] has been estimated at 80%. [19] One survey of Camargue-type horses found an overall population prevalence of 31.4%, with prevalence increasing to 67% in horses over 15 years old. [26]
Horses that have the cream gene in addition to a base coat color that is chestnut will become palomino if they are heterozygous, having one copy of the cream gene, or cremello, if they are homozygous. Similarly, horses with a bay base coat and the cream gene will be buckskin or perlino.
Lavender foal syndrome (LFS), also called coat color dilution lethal (CCDL), is an autosomal recessive genetic disease that affects newborn foals of certain Arabian horse bloodlines. Affected LFS foals have severe neurological abnormalities, cannot stand, and require euthanasia shortly after birth.