Polymorphism:

In object-oriented programming, the ability of different objects to respond, each in its own way, to the same message.
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a difference in DNA sequence among individuals. Genetic variations occurring in more than 1% of a population can be used for genetic linkage analysis.
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The ability of different object to respond to the same message in specific ways: Objects can have very different implementations of the same message. In Smalltalk polymorphic behaviour in responce to messages is independent of inheritance.

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