Question

Roan Cattle is an example of \(\_\_\_\_\)

• A. Incomplete Dominance
• B. Codominance
• C. Complete Dominance
• D. Polygenic Inheritance

Hint:

Codominance occurs when both alleles in a gene pair are fully expressed, resulting in offspring with a phenotype that is neither dominant nor recessive.

Answer 1

The Correct Option is B

Roan cattle exhibit a coat color where both red and white hairs are present and visibly expressed simultaneously. This pattern is a classic example of codominance, where both alleles in a heterozygous organism are fully expressed without blending. 
In codominance, neither allele is recessive or dominant over the other. Instead, both alleles contribute to the phenotype, resulting in a distinct appearance that shows both traits equally. In the case of roan cattle, the presence of both red and white coat colors is due to the expression of both alleles simultaneously.