Genetic Observations Through The Studies Of Hybrid Corn, Single Gene Es

Genetic Observations Through The Studies of Hybrid Corn, Single Gene Human Traits,and Fruit wingThe basic foundation of modern divisortics was led by Gregor Mendel (Corcos,1993). Mendel was not the premier(prenominal) to experiment with heredity, and our LymanBriggs biology class will not be the goal to deal with genetics. Genetics isthe science of heredity. In our lab, we had three main objectives. First, weevaluated our data on monohybrid and dihybrid corn cross seed counts againstMendels theoretical expectations of independent variety and the segregationof alleles. Next, we used the Hardy-Weinberg Theorem to provide a theoreticallyexpected value for allele frequencies for single human gene traits. Lastly, wedealt with Drosophila melanogaster and we examined red and white fondness alleles todetermine if this gene is sex-linked or autosomal.During the mid 1800s Mendel bred garden peas to study inheritance. Hechoose these plants because of their well defined characteristics an d theability to be magnanimous and crossed (Campbell, 1996). Mendel wanted to know thegenetic basis for variation among individuals and what accounted for thetransmission of traits from generation to generation. Mendel followed traitsfor the P generation, F1 generation, and F2 generation. The P generation is theoriginal true-breeding p arnts. Their hybrid offspring is the F1 generation,the first filial. The F2 generation is the second filial and is the self-pollination of the F1 hybrids. It was predominantly his research on the F2generation that led to Mendels Law of Segregation and Law of Independent categorization (Campbell, 1996).Mendels Law of Segregation states that alleles sort into separategametes. He formed this through performing monohybrid crosses. The F2generation will have a 31 phenotypic ratio. By considering more than one traitMendel formed his Law of Independent Assortment. He questioned whether traitswere inherited independently or dependently. By performing dihybri d crosses hefound that genes are independent and will form all possible combinations .Crossing two different traits resulted in a 9331 phenotypic ratio (Campbell,1996).Thomas Hunt Morgan also had a major contribution in the study ofinheritance. He was the first to associate a sp... ...ross, Mendels Law of Independent Assortmentillustrated that four possible phenotypes form a 9331 phenotypic ratio. Forthe single gene human traits experiment, we used the Hardy-Weinberg Theorem andequation to find the allele frequencies. For the experiment with Drosophilamelanogaster we examined a fruit fly cross between red-eyed males and white-eyedfemales. We determined that this trait is sex-linked when the offspring werered-eyed females and white-eyed males. Throughout the genetics lab each purposewas determined and explained. A lot was learned about Mendel, genetics, and thehereditary process that makes us who we are today.Cited LiteratureCampbell, N.A. 1996. Biology. The Benjamin Cummings Publis hing Co., New York, pp.238-279.Corcos, Alain F. and Floyd V. Monaghan. 1993. Gregor Mendels Experiments onPlant Hybrids. Rutgers University Press, New Jersey, pp. 45-46, 76,105-112, 133.Davis, M. 1996. Genetics. LBS 144 Laboratory Manual. The Lyman Briggs School,Michigan State University, East Lansing, pp. 25-36.