If speckled chickens were created by parents with feathers of two different colors then these chickens are an example of codominance (Option A).
What is genetic codominance?
Genetic codominance makes reference to the phenomenon in which both alleles or gene variants on the same locus are expressed in an equal manner, thereby heterozygous offspring have a mix of the phenotype observed in homozygous parents.
Therefore, with this data, we can see that genetic codominance may cause the expression of both alleles in the same genetic locus and therefore heterozygous are a mix of homozygous genotypes.
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