Because of natural selection, different alleles are more likely to confer a survival advantage in different environments. Cycles of infectious disease prevalence and virulence often reflect natural ...

A STABLE selectively balanced polymorphism dependent on a pair of autosomal genes (or chromosomal arrangements) is known to exist when the heterozygote is at a selective advantage with respect to both ...

Limnology and Oceanography (L&O;) publishes research articles, reviews, and comments about all aspects of limnology and oceanography. The journal’s unifying theme is the understanding of aquatic ...

This is a preview. Log in through your library . Abstract (1) The chat genus Oenanthe with eighteen species shows much polymorphism of color pattern in six species. (2) The variation is on the whole ...