Genetic polymorphism in banded snails,Cepaea nemoralis. Polymorphism is the coexistence within a population of several distinct genetic types of the same species. Variation in blood groups,for instance,is a example of polymorphism in humans. In Cepaea the colour and banding patterns seen on shells varies in a polymorphic manner. The different patterns are thought to help camouflage snails living in different habitats within the same geographical area | |
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