Question

The inheritance of flower color in Antirrhinum (dog flower) is an example of

• A. incomplete dominance
• B. co-dominance
• C. multiple alleles
• D. linkage

Answer 1

The correct option is A incomplete dominance

In the dog flower Antirrhinum there are two types of flower color in pure state: red and white. When the two types of plants are crossed, the hybrid or plants of generation have pink flowers. This is due to a phenomenon called the incomplete dominance in which one allele for a specific trait is not completely expressed over its paired allele. This results in a third phenotype in which the expressed physical trait is a combination of the phenotypes of both alleles ( in this case the red and white color and incompletely dominant and hence the third color pink is observed when they mix).

So, the correct answer is 'Incomplete dominance'.