The wild type is referred to as the phenotype of the typical form of any species occurring naturally.
Earlier, the wild type was known as a normal allele present at a locus, in comparison to that produced as a mutant(not normally present) allele.
Mutant alleles can become the wild type if a genetic shift occurs within the given population.
The wild type was useful in some experimental organisms like fruit flies Drosophila melanogaster, in which the wild type phenotypes for features such as eye color and wing shape were said to be altered by the particular mutations that produce mutated phenotypes, like white eyes and vestigial wings.