The term is used in genetics to contrast normal alleles with mutant alleles.
With Drosophila melanogaster, wild type usually means the standard version of the famous laboratory population used in the T.H. Morgan laboratory, and since used around the world. This was, of course, only a sample of the natural populations.
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Unlike culinary bananas, wild-type bananas have numerous large, hard seeds.
Wild type Facts for Kids. Kiddle Encyclopedia.