Consider the “variation” of any polymorphic moth ... consisting of distinct types which will breed as true as any species, and of mongrel forms which can throw certain fixed types, and ...

A single nucleotide polymorphism, or SNP, is a single base-pair difference in the DNA sequence of individual members of a species; not necessarily a pathological mutation, but commonly studied as ...

Why do humans wear clothes? One reason is that changing outfits allows people to tailor their look in hopes of attracting or avoiding attention. New research led by the University of Washington found ...