Melanogaster on Evolution Abstract This experiment was conducted to study the relative fitness of two phenotypes of the Drosophila melanogaster and how fitness can affect evolution in the population. The phenotypes were placed in two different environments‚ one in which contained a predator and another with no predator. Results of the experiment would show how the fitness of each phenotype is affected by providing a mechanism‚ and if evolution was occurring in the population. Two hypotheses were
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limitations.4.) Male and female sex organs available on the same flower- vital for plant genetic mating research | 1.) Pests- Pests are easily attracted to this organism.2.) Similar Genotype- Sometimes‚ the genotypes of different specimens are so similar that it is hard to distinguish the corresponding difference in phenotype. | D. rerio used for animal development research | 1.) Small Size and can be bred together in high densities- Feasible to breed many D.rerio in a small space. (Research Labs have
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selected to pass on to the offspring. This supports the fact that the mother and the father has to give an allele to the offspring to form a pair of alleles. Depending on which allele is selected from each parent‚ the offspring will express different phenotypes. The second law is the Law of Independent Assortment. This law states that separate genes for different traits is separated independently from one another and one of them is passed onto the offspring. This means that a particular gene in the pair
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their covalent bonds‚ or more specific‚ the phosphates and the sugar which composes the sugar/phosphate back bone of the polynucleotide. 2. How does an organism’s genotype determine its phenotype? The genotype of an organism is the genetic makeup of that organism‚ it is the nucleotide bases in the organism’s DNA. The phenotype is considered the physical traits of the organism which comes from the actions of the broad variety of proteins. The body of an organism is made up by the structural
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Record the genotype. Reshuffle until each partner has one offspring. 2. Both partners should record their genotype. They are now the next generation. 3. Each partner should obtain cards that correspond with the genotype. Randomly seek other people and mate with them to produce offspring of the next generation. Record genotype after each
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11. What is the structure of a DNA molecule? a. What forms the backbone of the DNA molecule? b. What kind of bonds occur between the 3’ OH on the 3’ C of one nucleotide and the phosphate of the next? b. What forms the “steps of the ladder”? c. What kind of bonds hold the nitrogen bases together? d. What is meant by anti-parallel strands? 12. What is Chargaff’s rule (what binds with what?) 13. How does DNA fold into a chromosome? (the 6 steps) 14. What is a nucleosome? 15. What are
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The purpose of this experiment was to determine the F1 genotype of fruit fly traits using the phenotypic ratio of the F2 generation and to express these results of the unknown cross through a Chi-square model and Mendelian genetics. After the experiment‚ it was found that the parents held a heterozygous genotype through using the Chi-square model‚ and that the observed and expected values fall within the Chi-squared value which also falls into the p-value. The Chi-squared value was 5.64‚ the degrees
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suit human needs. The article states that it is a gradual process‚ and domestication itself is not initially the goal. Domestication is the result of human efforts over an extended amount of time in which a species evolves to fit a desireable genotype/phenotype. In the reading it is also stated that domestication may have sparked social change in Africa. With domestication came herding and pastoral lifestyle‚ a lifestyle which favored certain social structures and may have led to the development of
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that underlies the sub-phenotype of sickle-cell anemia. Therefore‚ this could help in the discovery of drugs that could target the genes responsible for sickle-cell anemia. Genetic mutation and sickle-cell anemia Sickle-cell disease is a commonly known genetic disorder that puts the life at risk of millions of people across the world. This disorder can be classified as a monogenic disorder that results from
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Results : Phenotype Expected Expected Observed Ratio Counts Counts (Eͥ i) ͥ (Oi) Deviation (di) =(EiOi) di² = (EiOi)² di²/Ei Purple 75% 657 642 15 225 .34 Yellow 25% 219 234 15 225 1.03 Χ² = ∑ (di / Ei) = 1.37 According to the chi square chart values we are 80% confident that our hypothesis is correct. Exercise 34. Trait Phenotype Your Phenotype
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