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Polymorphisms

 

 

In biology, polymorphism is that the occurrence of two or more clearly different morphs or forms, also mentioned as alternative phenotypes, within the population of a species. To be classified intrinsically, morphs must occupy an equivalent habitat at an equivalent time and belong to a panmictic population (one with random mating).

Put simply, polymorphism is when there are two or more possibilities of a trait on a gene. For example, there is more than one possible trait in terms of a jaguar's skin colouring; they can be light morph or dark morph. Due to having quite one possible variation for this gene, it's termed 'polymorphism'. For example, if there was just one possible complexion that a jaguar could have, it might be termed monomorphic.

Genetic polymorphism may be a term used somewhat differently by geneticists and molecular biologists to explain certain mutations within the genotype, like single nucleotide polymorphisms which will not always correspond to a phenotype, but always corresponds to a branch within the genetic tree.

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