Monohybrid In Corn Plants

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Adam Hughes Bio 1106 Lab 57 David Larson Corn Genetics and the Chi-Square Test: Investigating the Genotypes of Corn Plants from Their Phenotypes Abstract: This experiment demonstrates genetics. The study of genetics and inheritance is concerned with understanding the biological properties that are transmitted from parent to offspring. In this laboratory you will study the results of some inheritance crosses similar to those performed by Mendel in his classical experiments on heredity in corn height. In addition to studying the information about such inheritance patterns we will learn how to apply a statistical test to determine the validity of data obtained by such crosses. Corn plants are used to demonstrate the genetics of corn breeding for a monohybrid. The results of the monohybrid crosses for height are significantly different than the expected ratio 3:1, suggesting counting error, sampling error, or insertions of genetic information from transposon. Introduction: Without knowing about the heritable factors, humans have been used the basic principles of inheritance. By observing the breeding between two individuals, selecting desirable traits and attempting to propagate them, we have been improving crops and animals for thousands of years before the genetic inheritance began to reveal. In 1866, when Gregor Mendel presented his findings on the inheritance of traits in garden peas, the world began to discover the mysteries of genetic inheritance. In his famous experiment on pea plants, Mendel proposed that an organism carries two heritable factors for each visible character but transmits only one heritable factor to offspring. Today we know that these heritable factors are genes, carried on two chromosomes, one inherited from each parent. Mendel also demonstrated that a combination of dominant and recessive traits between two parent determine the

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