The Drosophila melanogaster In this experiment‚ the species Drosophila melanogaster‚ the common fruit fly‚ was studied to examine the processes of natural selection and genetic drift in the laboratory. The fruit fly has a sex linked gene determining eye colour. Located on the X chromosome‚ a fruit fly can exhibit the phenotype white eye (homozygous recessive)‚ or red eyed wild-type (dominant). Males of the species are XY‚ and as such only carry one eye colour determining X chromosome. Females
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What Can Fruit Flies Reveal about Inheritance? Lab Notebook Chi-Square test for Case 1 Phenotype Observed No. (o) Expected No. (e) (o-e) (o-e) 2 (o-e) 2 e Red eyes 31 33 2 4 0.1212 Sepia eyes 13 11 2 4 0.3636 2 (to the nearest ten-thousandth) 0.4848 Questions 1. Why is it important to remove the adults in the parental generation? To keep the tests accurate‚ it is important to separate the adults from the parental generation so you know you are only crossing the F-1 flies. 2
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In this population cage‚ it used Drosophila melanogaster because is a common model organism for genetic studies. In this population cage‚ it was calculated the coefficient of selection of an actual sample and an ago sample. In this experiment‚ it was used the actual sample #4 and the ago sample #3. The result of the coefficient of selection should be at the rate between 0 and 1. The result was 0.82‚ so it was a good result of the coefficient of selection between these two samples (#4 and #3). At
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Fruits Professor Kelechi Mezu Introduction to Biology – SCI 115 March 2‚ 2010 We use our sense of taste to differ if fruit is sweet or sour. That taste depends on the components in the fruit. Fruits contain fructose‚ acids‚ vitamin‚ starch‚ proteins‚ and cellulose. All of these components contribute to the taste of fruit. Fruits with high fructose levels tend to be sweeter whereas fruits with high levels of acid tend to be sour. Oranges however‚ have equal quantities of fructose and acids
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Introduction The purpose of the experiment that has been conducted is to breed Drosophila melanogaster for specific traits. We used a dihybrid cross where the traits were sex linked. The cross is considered dihybrid due to the fact that we are crossing two different traits. The traits used for this dihybrid cross experiment are white eyes (w) and vestigial wings (vg). The white eyes are the sex linked trait. These traits were taken and crossed with wild type D. melanogaster. The experiment
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The Effects of Environmental Stimuli on Animal Behavior AP Biology Emily Olsen April 26‚ 2012 I. Introduction: The purpose of this lab is to test the effect certain stimuli has on the behavior of a terrestrial isopod. These bugs are more commonly known as pill bugs and potato bugs. The objective of this experiment is to determine which kinds of habitats potato bugs favor. Potato bugs have an innate behavior called taxis which will cause the animal to move away from a stimulus that is unwanted
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Cinthya Perez Per.3 AP Biology 11/20/12 1.) In the structure of a eukaryotic plant cell consist of a membrane-closed nuclei and organelles‚ since they developed a process in which they manufacture their own food. The Chlorophyll‚ which gives the plant the green color captures sunlight to convert water and carbon dioxide into glucose and carbs‚ in which are used for the repetition of the cycle. Not only does the plant cell consist of a membrane‚ unlike other eukaryotic cells it additionally
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Mrs. McCarron 12/10/14 A.P Biology Drosophila melanogaster Genetics Introduction: The common fruit fly‚ scientifically named Drosophila melanogaster‚ is used by many in genetic studies. Because they can be easily cultured‚ have a relatively short generation time‚ and are prolific breeders‚ fruit flies are often very popular in genetic investigations. Furthermore‚ mutations and sex are easy to visualize among the fruit flies. Male fruit flies have a smaller abdomen than their female counterparts
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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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