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Genetic Variation In Great Whites

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What is genetic variation? Genetic variation refers to diversity in gene frequencies. Genetic variation can refer to differences between individuals or to differences between different populations. Mutation is the best source of genetic variation.Mutation is the changing of the structure of a gene, and when resulting in a variant form that may be transmitted to subsequent generations, caused by the alteration of single base units in DNA, or the deletion, insertion, or rearrangement of larger sections of genes or chromosomes. but mechanisms such as sexual reproduction and genetic drift contribute to it alot.As with other species, Great Whites are somewhat differ among individuals from place to place. Great Whites from southern …show more content…

However, most of these are not fatal, and new research finds that great whites, who are naturally curious, are "sample biting" then releasing their victims rather than preying on humans. “It's not a terribly comforting distinction, but it does indicate that humans are not actually on the great white's menu(E.O Wilson)”.Great whites are the largest fish and weighing up to 5,000 pounds have been recorded.Highly adapted predators, their mouths are lined with up to 300 serrated, sharp teeth arranged in several rows, and they have an exceptional sense of smell to detect prey. They even have organs that can sense the tiny electromagnetic fields produced by animals. They usually eat sea lions, seals, small toothed whales, and even sea turtles, and carrion.The original hypothesis for the great white's origins is that it shares a common gene with its ancestor with a prehistoric shark. The only predator that can kill a shark is a whale and sometimes whales aren't fast enough to catch the sharks most times.Most sharks live in depths of waters on 12 degrees to 24 degrees fahrenheit. Great white sharks have a great sense of touch through what’s called the lateral line.It is a line that extends along the middle of the shark’s body from its tail to its head. Found in all fish, it is made of cells that can …show more content…

aka white sharks, white pointers, blue pointers, man-eaters, manila sharks, have, according to E. O. Wilson "...rightfully been called a top carnivore, a killing machine, the last free predator of man—the most frightening animal on earth.“Three were young sharks, which could not have travelled far from their birth place, confirming active nurseries in the Mediterranean. The mitochondrial DNA controls some regions that were by established by the ancestors of the Great White sharks.Some of them might come from from the Atlantic populations but from Pacific Australia and New Zealand. Sharks external ears are very hard to see, they only have just two small openings behind and above the eyes. The ears may be small, but they’re powerful. Inside, the cells can sense even the tiniest vibration in the water around them. Sharks also have an ‘ear stone’ that gives the animal clues as to where the others are in the water:.”The time, 450,000 years, suggested very few white sharks may have made a navigational error by following extensive of an exceptionally strong current, which at this time penetrated the cooler .The Benguela current goes farther north and west than at present. Sharks who swim east and north would have become entrapped in the Mediterranean, where natal philopatry of young would ensure population continuity. Potentially isolated Mediterranean white sharks propagate from a small founding

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