At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
I believe that polymorphism is essentially the manifestation of the concept of diversity manifest. So polymorphism would be when there are 2 or more phenotypes exist concurrently within the same species
A genetic polymorphism is where there are two or more genotypes present at a stable level in a population. The simplest example of this is a SNP; a single nucleotide polymorphism. This is manifest where individuals can have different bases at a specific point in their DNA. For example person 1 has a A where person 2 has a G. To be a polymorphism this change has to be stable in the population (i.e. not just a random mutation which doesn't persist for more than one generation). I believe if more than 5% have the minor genotype (G rather than A as per our example above) then the locus can be referred to as a polymorphism.
Various bloodtypes and sexual orientation (male/female), cast systems? The articIe I read talked about the status in a bee colony. I would compare that to a cast system in society, but it may not be the right choice. To me, that is not Diversity, it is where you are stuck..as in your placement or job in a bee colony. Diversity to me is being accepted, not being forced to be an ant who has a job you are stuck with because that is where you are born.