Definition of "polymorphisms" [polymorphisms]

• Plural form of polymorphism. (noun)

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• "What makes humans different from earthworms (and from each other) is the 1.5 to 3 million subtle differences in their genes called polymorphisms (single nucleotide polymorphisms, or SNPs)."
• "Genetic variations (called polymorphisms) make some people more prone to metal toxicity."
• "Less clear is a possible association between more common variations in these genes known as polymorphisms, and the formation of breast cancer."