Is blood type an example of pleiotropy?

Pleiotropy:

1. Pleiotropy is the phenomenon in which a single gene may produce more than one phenotypic effect.
2. Phenylketonuria is an example of pleiotropy.
3. Blood type is not an example of pleiotropy.

Blood type:

1. Blood type is an example of multiple allelism and codominance.
2. Multiple allelism is the phenomenon when more than two alternative forms of a gene occupy the same locus on a chromosome in a population.
3. More than two alleles govern the same character in multiple allelism.
4. Codominance is the phenomenon in which 2 alleles express themselves independently when present together in an organism.
5. In codominance, offspring shows resemblance to both parents.