A cross between a horse with red coat and a hourse with a white coat results in a roan horse with both red and white colors?

Answer 1

The actual term for this is refered to as "roaning" but the pattern is not patches but white and colored hair mixed together all over the body. It looks a little like older horses when the hair starts to turn white. Roans come in several different colors. (red roan, blue roan, black roan, ect.)

Answer 2

Roan is a horse coat color pattern characterized by an even mixture of colored and white hairs on the body. Horses with roan coats have white hairs evenly intermingled throughout any other color.

Answer 3

The foal is not 100% likely to have a red and white coat. The foal could have an entirely different color coat than it's parents. My old pony was white, but his parents had darker coats. Its not really a genetic thing, like it is for humans. Two white horses could have a foal and it could be black, roan, chestnut, bay...anything. Hope that answered your question ;)

Answer 4

The mention of the example Roan leads me to think you mean to express this in terms of mono/dihybrid crossing.

This is called incomplete dominance were the allelles may be Rr, a split between a white and a red breed. (Heterozygote). For more information see attached online lecture notes.

Answer 5

Roan color in cattle is created by incomplete dominance between the body colors white and red or white and black. This is a common characteristic of the Shorthorn breed of cattle, however the mechanism of transmission in horses is a single dominant allele.

The roan allele (Rn) in horses is a dominant trait that creates an individual with dark points (face, mane, tail and legs are the base coat color) and the body has base coat colored hair and white hair intermixed. A non-roan is rnrn and a Heterozgous individual is Rnrn. It was originally thought that homozygous roan RnRn was lethal, however this has proved to be erroneous. There is some variation in the amount of white hair interspersed on the body from individual to individual

Another form of roaning in horses, (Frosted Roan/Varnish Roan) is associated with the Leopard complex set of alleles in Appaloosa horses.

Answer 6

It is an example of co-dominance.

Answer 7

co-dominance