Genetic variation within a population is measured according to the number of different alleles of ... phenotype may or may not be observable. Tropical butterflies provide an excellent example ...

Genetics, vision and neural processing are all linked to mating behavior in Heliconius butterflies, say scientists. They found that a "simple" neural change alters mating preferences in male ...

Nicholas VanKuren, of the University of Chicago, said: "Heliconius are a group of tropical ... butterflies. They then analyzed gene expression patterns in the retina, optic lobe and brain at ...