. . . . . . is an intragenic interaction.

In a gene showing codominance,the alleles:

$A$ 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?

What will be the phenotypic ratio of the offspring when a roan-colored cow is crossed with a white bull?

In the $ABO$ blood grouping system,which of the following is an example of co-dominance?

What is the phenomenon called where factors produce independent effects in their heterozygous condition?