Lect1-Intro - Genetics:Overview History (10k12kyrs ago...

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Genetics: Overview
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History Domestication of plants and animals was  first application of genetics (10k-12k yrs  ago) Wheat, lentils, barley, goats, dogs, sheep Figuring out the processes started with  Gregor Mendel
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History Walther Flemming observed  division of chromosomes Each organism had a diploid  number, through meiosis, it was  halved. Walter Sutton/Theodore Boveri  noted parallels btw genes and  chromosomes  Exist in pairs and segregate Led to chromosome theory of  inheritance
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History Thomas Hunt Morgan  discovered first genetic  mutants fruit flies with  different eye color Normal ( wild-type ) v.  mutant Led to search of chemical  nature of gene: DNA or  protein? Recombinant DNA  technology
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Genes that determine a trait are the  genotype , the trait they produce is the  phenotype
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All organisms have similar genetic  systems
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