Alleles which show independent effect are called

In codominance,the phenotypic ratio is......

When two genes with independent expression are present together, they both express their characteristics, and when they are separate, they express their individual characteristics. This phenomenon is observed in which of the following?

Which principle is demonstrated by a cross in which the $F_1$ generation resembles both parents?

In cattle,when a cross results in offspring with roan (spotted) coat color,which of the following phenomena is demonstrated?

$A$ roan bull is crossed with three cows. Cow $A$ has the same genotype as the roan bull,cow $B$ is red,and cow $C$ is white. What should be the proportion of roan offspring in each group of cows?