multi-colored tail. Typical examples tend to have more white than dark, whereas typical frame overo horses tend to more dark than white, though there are many exceptions in both cases. It is created by a different gene from any of the overo patterns and is a dominant gene. All tobianos must have at least one tobiano parent. When a tobiano allele is present, it is epistatic and often masks other patterns. Tovero and other mixed patterns A tovero horse has pinto spotting patterns that show characteristics of both overo and tobiano and probably carries genes for both. For example, a tovero might have tobiano body spotting with rounded edges and white across the back, yet have irregular facial markings and blue eyes. Horses may also have a combination of sabino and frame overo genetics or any other combination of genes, resulting patterns that are difficult to smoothly classify into any one group. Gallery See also Pinto horse American Paint Horse Lethal white syndrome Equine coat color Equine coat color genetics References "Horse coat color tests" from the University of California, Davis Veterinary Genetics Lab "Introduction to Coat Color Genetics" from Veterinary Genetics Laboratory, School of Veterinary Medicine, University of California, Davis. Web Site accessed January 12, 2008 External links "Splashed White horses, Min to Max expression" Web Site Accessed August 18, 2008 American Paint Horse Association Pinto Horse Association of America Spotted Saddle Horse Breeders & Exhibitors Association Horse coat colors