JAMB - Biology (2011 - No. 36)
If the cross of a red-flowered plant with a white-flowered plant produces a pink-flowered plant, it is an example of
codominance
incomplete dominance
mutation
linkage
Paskaidrojums
In incomplete dominance, neither allele for a trait is completely dominant, resulting in a heterozygous offspring that displays a blended phenotype between the two parent traits. For example, crossing a red flower plant with a white flower plant will produce pink flower plants. This differs from complete dominance where the dominant allele masks the recessive one, and from codominance where both alleles are expressed.
(see diagram above)