Bahamas Local, however, reports that a hurricane occurs about every three years with a major tropical storm every 12 years. Andros, Abaco and Grand Bahama are ranked in the top 10 places hit by tropical systems in the North Atlantic.
An example of a botanical genetic polymorphism is heterostyly, in which flowers occur in different forms with different arrangements of the pistils and the stamens. The system is called heteromorphic self-incompatibility, and the general 'strategy' of stamens separated from pistils is known as herkogamy.enetic polymorphism is actively and steadily maintained in populations by natural selection, in contrast to transient polymorphisms where a form is progressively replaced by another. By definition, genetic polymorphism relates to a balance or equilibrium between morphs.
Some genetic characteristics exhibit complex inheritance patterns, meaning they appear as gradients instead of a feature that is either there or not. The gradient results from multiple genes that contribute to the characteristic.Skin color is a perfect example. Multiple genes work together to determine skin color, so it is called a polygenic trait. Within a population of people, the âmiddleâ type of appearance is often most common -- medium-toned skin.ome genetic characteristics exhibit complex inheritance patterns, meaning they appear as gradients instead of a feature that is either there or not. The gradient results from multiple genes that contribute to the characteristic.