A black panther is typically a melanistic colour variant of any of several species of larger cat. Wild black panthers in Latin America are black jaguars (Panthera onca), in Asia and Africa they are black leopards (Panthera pardus), and in North America they may be black jaguars or possibly black cougars (Puma concolor – although this has not been proven to have a black variant), or smaller cats. In jaguars, the melanism allele is dominant. Consequently, black jaguars may produce either black or spotted cubs, but a pair of spotted jaguars can only produce spotted cubs. The gene is incompletely dominant: individuals with two copies of the allele are darker (the black background colour is more dense) than individuals with just one copy, whose background colour may appear to be dark charcoal rather than black.