Question

What is polymorphism with respect to Cnidaria ?

Answer 1

Polymorphism may be defined as the “phenom­enon of existence of different physiological and morphological forms represented by an extensive range of variation within a single species”.

It may be defined in another way, poly­morphism means “the existence of indi­viduals (zooids) of a single species in more than one forms and functions. Cnidarians ,especially the members of order siphonophora and chondrophora exhibit polymorphism.

Answer 2

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• Polymorphism is a form of genetic variation in which distinct nucleotide sequence can exist at different sites in a DNA molecule.
• This heritable mutation is observed at a high frequency in a population.
• It arises due to mutation either in somatic cell or in the germ cells.