DNA QUESTION 1995: L. PETERSON/AP BIOLOGY The diagram below shows a segment of DNA with a total length of 4‚900 base pairs. The arrows indicate reaction sites for two restriction enzymes (enzyme X and enzyme Y). (A) Explain how the principles of gel electrophoresis allow for the separation of DNA fragments. (B) Describe the results you would expect from electrophoretic separation of fragments from the following treatments of the DNA segment above. Assume that the digestion
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Abstract Drosophila Melanogaster is one of the best organisms to study when researching genetics; in particular sex linked genes on the X chromosome. The principle reason for this study was to determine what genes were transferred to the males from the females‚ as the males only inherit one X chromosome. Two experiments were conducted in which female and male flies were crossed. The first experiment was a cross between 5-trait females and wildtype males; the second experiment was a cross between
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A) As we watch the Bursatella leachii‚(sea slug)‚ we notice that the distance between them is directly proportional to the time of day. As the sun because stronger‚ and higher in the day‚ the average distance between the sea slugs greatens. As the sun becomes weaker‚ the distance between the sea slugs lessens. I believe this has to do with the reaction the Bursatella leachii has towards the sunlight. This hypothesis is based on the idea that the Bursatella leachii eat during the day. Since they
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fruits This list of culinary fruits contains the names of some fruits that are considered edible in some cuisines. The word "fruit" is used in several different ways.[1] The definition of fruit for these lists is a culinary fruit‚ i.e. "Any sweet‚ edible part of a plant that resembles fruit‚ even if it does not develop from a floral ovary; also used in a technically imprecise sense for some sweet or sweetish vegetables‚ some of which may resemble a true fruit or are used in cookery as if they
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Effects of Organic Food on Drosophila Melanogaster A new study has shown that fruit flies that lived on organic foods tended to be healthier than those that lived on conventional foods. The two things that researchers based their conclusions for health on were fertility and longevity. These two things are two important aspects to a fly’s life. On both of these tests‚ the flies that were fed organic food performed better than the flies that were fed conventional food. They survived for a longer
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Taste discrimination in young and old Drosophila melanogaster Introduction The ability to discriminate taste is critical for the survival and nutrition of an organism (Sellier et al.‚ 2010‚ Gordesky-Gold et al.‚ 2008). Many animals rely on their taste organs to detect and discriminate various types of taste such as sweet or bitter (Weiss et al.‚ 2011). When these organs come in contact with a food source‚ signals are sent to taste receptor cells. The activation of certain taste receptor cells by
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Abstract: This experiment‚ which was used to explore the Theory of Evolution created by Charles Darwin. The use of natural selection was apparent in the artificial modification of an organism’s traits which aided in this investigation. Through this experiment the Wisconsin Fast Plant was used. It is a fast-growing organism developed to improve the resistance to disease in cruciferous plants. This plant aids scientist in the exploration of environmental effects on population due to the speed to
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Biology Guide 1. How is the human body organized? A= The levels of organization in the body include cells‚ tissues‚ organs‚ and organ systems. 2. Define cell A= Basic unit of structure and function in living things. 3. Define Tissue A= Group of cells that perform a single function. 4. CHECK OUT TYPES OF TISSUE ON PG. 863 5. What’s the epithelial tissue? A= Tissue that lines the interior and exterior body surfaces. 6. Connective tissue? A= Tissue that provides support
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Discussion The goal of the experiment was to determine what gene or genes are responsible for the white eye phenotype of two strains of Drosophila melanogaster. According the literature‚ the w+ gene is located on the X chromosome at 1.5 genetic map units (1). In addition‚ the st+ and bw+ genes are autosomal and assort independently‚ meaning they are two different genes located on two different chromosomes. It is stated that the bw+ gene is located on the 2R chromosome at 104.5 map units (2)
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Drosophila melanogaster‚ more commonly known as the fruit fly‚ is commonly used as a model organism in genetic research. Using D. melanogaster has a multitude of practical advantages for researchers. These include a fast reproduction cycle of approximately 30 days‚ small physical size‚ cost-effective culture and growth in large quantities‚ and a small genome size of 4 pairs of chromosomes. A basic understanding of the anatomy and genetics of D. melanogaster is necessary before preforming genetics
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