Gene Flow

Gene Flow When individuals move between genius state and a nonher, naked as a jaybird divisors may be introduced to populations. This phenomenon, known as gene flow, results from notice dispersal as well as intentional migration. Take, for example, cardinal populations of related wildflowers, maven red and cardinal white, separated by a macro tract of land. Under normal circumstances, the 2 groups do not interbreed because the move does not daze hard teeming to carry pollen between the populations so that pollenation can occur. If one day an unusually strong wind carries pollen from the red wildflower population to the white wildflower population, the gene for red flowers may be introduced to the white populations gene pool. In many animals, gene flow results when individuals from one population migrate to another population. The Lake Erie water snake provides an nice example. Although skilled swimmers, these snakes lead much of their day basking in the sunniness on overhanging plant or rocks. In Lake Erie, water snakes ashes distinct populationssnakes that belong on the rock islands in the lake, and others that live in the ve desexation contiguous to the brim.

Shore populations have old bodies with black bands, a coloring that helps them evade hungry seagulls by blending with the shoreline vegetation. Island snakes are primarily light gray with no banding, coloring that helps them to blend in to their rocky surroundings. An easy bell ringer for seagulls, tie island snakes seldom survive to reproductive age. Yet every year, biologists count banded newborns among the island lit ters. What at first appeared to be a mystery! was ulterior revealed to be gene flow at work. Although the populations do not regularly interbreed, once in a while shore snakes, carried by currents or winds, migrate to the islands. one time there, they collaborator with island snakes, reintroducing the gene for banding into the island population as they do.If you ask to get a full essay, order it on our website: OrderCustomPaper.com

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