In a certain plant, the alleles a, b, and c are dominant to the alleles a, b, and
c. a plant with the genotype aabbcc will have the same phenotype as the plant with the genotype

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link:

b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.

layer 3 is younger than layer 6.