If a homozygous black bull is mated with a homozygous white cow and the calf is gray, this would be an example of however, if the calf has black and white spots, this would be an example of

The first statement above is an example of incomplete dominance. If the calf has black and white spots then that’s an example of codominance.

Incomplete dominance is a form of transitional inheritance in which one allele for an explicit trait is not entirely expressed over its paired allele. This effects in a third phenotype in which the expressed physical trait is a mixture of the phenotypes of both alleles.

Codominance is a form of dominance by which the alleles of a gene pair in a heterozygote are wholly expressed. This effects in offspring with a phenotype that is neither dominant or recessive. A usual example showing this type of dominance is the ABO blood group system.

this protocol provides a detailed procedure for total protein extraction for western blot analysis from achieved samples following trizol isolation of rna.