AP BIOLOGY

Detailed explanation-1: -The roan coat color in horses is also an example of codominance. A “red” roan results from the mating of a chestnut parent and a white parent (Figure 2). We know this is codominance because individual hairs are either chestnut or they are white, leading to the red roan overall appearance.

Detailed explanation-2: -Codominance is the form of inheritance in which both alleles of a gene pair are expressed. Complete answer: The cross between a roan bull (Ww) and red cow (WW) produces roan and red phenotypes in 1:1 ratio.

Detailed explanation-3: -In codominance, the alleles of a gene pair in a heterozygote are fully expressed. This results in offspring with a phenotype that is neither dominant nor recessive. As for the incomplete dominance definition, this form of inheritance occurs when the phenotype is intermediate to the phenotype of the parents.

Detailed explanation-4: -Codominance means that both phenotypes show simultaneously, so the heterozygote would be both red and white, which is a distinct third phenotype. These organisms would show spots or splotches of each color. This gives three total phenotypes: red, white, and red-white spotted.