Fast Plant Genetics Lab Report.docx - Fast Plant Genetics...

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Fast Plant Genetics Lab Report Samantha Horton Bio 107; Section 02 24 April 2020
Abstract: This report details the experiment conducted regarding Mendelian plant genetics. Brassica rapa, a fast-growing plant, was used as the subject of the experiment, documenting the phenotypes expressed as result of a dihybrid cross of two different pure-bred seeds. The phenotypes expressed in this experiment focused on leaf and stem color. The stems could either be green or purple, and the leaves yellow or green. Beginning with a parent line (P1) three generations were observed throughout the duration of the lab, cross pollinating the plants once mature to create both a F1 and F2 line of plants. Their characteristics were documented and used to analyze the results of the dihybrid cross. The experiment provides analysis of the ratios produced by the plants and the reliability of the Mendelian dihybrid cross. Introduction: Gregor Mendel famously developed the ideas behind hereditary genetics still respected today through his experiments conducted with pea plants. His experiments with the pea plants suggested that visual phenotypes were not passed down in a straight line, but that offspring could express genes their parents did not (Mendel, 1865). Mendel was initially interested in inheritance, fertilization, and natural hybridization years before he conducted his plant genetics experiments (Dijk, Weissing, and Ellis, 2018). Mendel discovered that genes can be either hidden or expressed, depending on whether or not the gene is dominant or recessive, called the Law of Segregation (Mendel, 1865). This discovery disputed all other explanations of how genetics were passed down in species, and much of his work was destroyed after he died, many refusing to support him until the 1900s when his work was supported by other research conducted (Dijk,
Weissing, and Ellis, 2018). Since then, many other researches seek to find the extent to which

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