Differences in adult male size and age at sexual maturity in the Rio Coy (Mexico) population of Xiphophorus nigrensis (Pisces; Poeciliidae) are controlled by genetic variation at a Y-linked locus.

1. Exaggerated morphological structures that evolve under sexual selection have the potential to alter functional relationships and hence affect aspects of movement. These effects may be more ...

In many species all over the animal kingdom, males have eye-catching characteristics. Although often impractical, they are beneficial in finding a mate. Scientists have now mapped the genetic bases of ...

RECENTLY it was stated that morphogenetic movements in gastrulation of the viviparous teleost Fundulus heteroclitus occur in a normal fashion in cases in which cytokinesis is prevented by treatment ...