Overcoming the congenitally disadvantageous mutation through adaptation to environmental UV exposure in land snails.

Abstract excerpt

Congenital fitness-disadvantageous mutations are not maintained in the population; they are purged from the population through processes such as purifying selection. However, these mutations could persist in the population as polymorphisms when it is advantageous for the individuals carrying them in adapting to a specific external environment. We tested this hypothesis using the dimorphic land snail Euhadra...

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