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Advantages and disadvantages of selective breeding
Advantages and disadvantages of selective breeding
Genetic selection pros and cons
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Selective breeding is just picking the individuals with a desired trait that you want to reproduce. If you want brown hamsters, you would only let the brown hamsters you have breed with other brown hamsters until you have all brown hamsters. This is how goldfish came to be, as well as most other domesticated species. Transgenic manipulation involves directly altering the chromosomes to get a desired effect. When you use selective breeding, you work with the characteristics already existing, with transgenic manipulation, you can make an entirely new characteristic. Selective breeding can have some negative effects. Through selective breeding we reduce genetic diversity, so if there was a sudden change in the environment then most …show more content…
Another problem is that the best way to spread a rare trait through the population is by inbreeding, but that also risks the spread of other effects that might have negative consequences. Another harmful effect could be the ethics of selective breeding. For example, many farm animals are selectively bred to unhealthy extremes. One example might be meat hens, which are bred to put on weight so fast that many suffer walking disability as a result. There are also positive effects in selective breeding. In plants methods of selective breeding can potentially positively influence world food production by improved quality of seed grains and increased levels of proteins in crops. It is also beneficial by helping the plants to be
The major topic of this experiment was to examine two different crosses between Drosophila fruit flies and to determine how many flies of each phenotype were produced. Phenotype refers to an individual’s appearance, where as genotype refers to an individual’s genes. The basic law of genetics that was examined in this lab was formulated by a man often times called the “father of genetics,” Gregor Mendel. He determined that individuals have two alternate forms of a gene, referred to as two alleles. An individual can me homozygous dominant (two dominant alleles, AA), homozygous recessive, (two recessive alleles, aa), or heterozygous (one dominant and one recessive allele, Aa). There were tow particular crosses that took place in this experiment. The first cross-performed was Ebony Bodies versus Vestigle Wings, where Long wings are dominant over short wings and normal bodies are dominant over black bodies. The other cross that was performed was White versus Wild where red eyes in fruit flies are dominant over white eyes.
... lack reproductive fitness. They also revert to beast form very rapidly. For these reasons it is clear that they will die out quickly.
Each and every individual organism has unique combination of alleles. The greater the variation of alleles in a species, the less likely the species is to die out as they’re all different and so react differently to threats in terms of infection and can defend themselves in numerous ways. This means that even if there was an outbreak of disease, because the variation of genes and combinations of al...
The introduction to the article and the following six paragraphs are not composed of opinions or viewpoints. The general facts and methods of genetic engineering are described, and the companies behind the research are introduced. Loaded words are used in this part of the article but are not very common.
Furthermore, the grey squirrel’s color and size are distinctive traits that separate it from other species. First of all, coloring stays the same when it comes to males and females. Its hue ranges from pale grey to dark grey (Fischer, Lawinczak, Pagad). Its ears, underparts, and tail are all white to pale grey. Ginger-colored fur can be found on this squirrel’s head, hips, feet, and underparts (Lawiczak, Pagad). A natural occurrence among the grey squirrel is melanism, meaning it has an elevated amount of melanin in its pelt (Fischer, Lawinczak, Pa...
... pushing grizzlies north. This summer marked the most drastic melting of Arctic sea ice to date. Biologists fear that this will promote the development of hybrids. A 2010 essay in the journal Nature counted 34 species that could be affected. Populations whose habitats have been separated by masses of ice could interbreed: belugas with narwhals, largha seals with common seals, Greenland whales with North Pacific right whales.
Some individuals have developed different traits to help them in the process of intra-sexual competition. The organisms with more distinctive traits have greater reproductive success. More genes of those traits are then ‘selected’ and are passed onto the offspring of the organisms. Throughout time variability in these traits becomes
This process is called self-fertilization. If a plant or any organism receives the same genetic traits from both of its parents, it is called purebred. Self-fertilization produces purebred pea plants. As you can see Mendel also altered plants and transferred pollen by hand. By controlling pollination and preventing self-fertilization, Mendel crossbred plants, producing hybrids. A hybrid is an organism that receives different forms of a genetic trait from each parent.
Among the fears of many environmentalists is that of overpopulation. Acutely aware of the finite resources that the planet possesses and the limitations of renewable resources, there are concerns that the planet may soon reach its maximum caring capacity. Since the First Great Transition ten thousand years ago, the planet has experienced an astounding increase in population. Generations later, the planet is beginning to feel the effects of continual population expansion. Over the years, numerous methods have been proposed or adopted to ensure that the Earth will not exhaust its resources. One of the most frightening adapted solutions was the eugenics movement.
Winter White colored dwarf hamsters could be a lot rarer compared to the Campbell’s dwarf hamster in local pet stores. They are normally offered in pairs of the same sex and are extremely friendly. What's also so incredible about these little critters is their capability to switch their color in the wintertime months. Within their native
If crops were affected by droughts, disease and insects, having destroyed many acres across America’s Midwest region, the use of Genetically Modified Organisms (GMOs) would not be beneficial in regenerating new crops. Genetically modifying foods (GMOs) “are plants or animals that have been genetically engineered with DNA from bacteria, viruses or other plants and animals that cannot occur in nature or in traditional crossbreeding” (nongmoproject.org). Most research done has concluded no positive benefits in using GMOs. There are serious health risks associated with eating GM foods based on scientific research done around the world. The purpose of GMOs are to increase production of crop yield and reduce pesticide use but research says otherwise. If farmers wanted to continue using GMOs to produce crops, labeling should be mandatory to allow consumers to have a conscious choice whether or not to eat GM food. Through research it has been proven that the use of GMOs to increased production of crops during a time of drought or disease have no benefits, just risks.
of species due to a variety of causes. Included is out competition, depletion of resources
New technological advances are being mad every day, especially in genetics. With great innovations comes concerns whether it will have a good cause or be used for bad intentions. One of these is eugenics, the idea to improve genetic composition in humans most specifically in future fetuses. The idea started in 1883 by Sir Francis Galton who wanted to selectively breed humans using desired traits to create a perfect human race. This lead to many unethical moments in history such as the sterilization of unfit humans in the 19th century as well as Hitler’s use of eugenics during WWII. However, current use helps identify possible inherited diseases/conditions in unborn children and remove those traits from the DNA. Although eugenics has been used
Eugenics refers to the science of regulated breeding to increase the occurrence of favorable traits, decrease that in undesired ones and overall, improve a species. During the years 1890- 1930- known as the progressive era, the science sparked a movement of groups in Britain and the US who supported this controlled reproduction to achieve an improved human race in their society. During this time it was highly supported as it was believed to be a method to eliminate the increasing criminals, poor and incapable workers in society. The progressive era was a time of strong desires for reform to rid of industrial and social problems in society. The sudden influx of scientific