Researchers studied two lizard types and found that heat rewrites their breeding biology. Madagascar's Guibé's ground gecko ...

In humans and many other animal species, sex is determined by specific chromosomes. How did researchers discover these so-called sex chromosomes? The path from the initial discovery of sex chromosomes ...

These activities introduce ideas about heredity, observing the differences and similarities in a population, and modeling how inheritance works. Campers can think about organisms as systems in which ...

A preliminary analysis is presented of the mode of inheritance of patterns of male secondary sex coloration in several wild populations of Lebistes reticulatus in Trinidad. A high proportion of such ...