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Unit3_notes - Unit Three Notes Heredity The transmission of...

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Unit Three Notes Heredity The transmission of traits from one generation to the next. Greg Mendel –Austrian Monk---1800’s Observed some traits disappeared in one generation, only to reappear in the next. Hypothesis Some traits are stronger than others. Experimental Design Needed something which could be easily manipulated. Something with a variety of visible characteristics. The Garden Pea Quick generation time Does not require much space Peas undergo self-fertilization o Pollinate themselves Could also pry open petal to make specific crosses between plants. Many visible traits: Flower color Seed color Seed shape Plant height Parental Generation o For each trait studied he wanted a true breeding plant to begin the experiment. o True Breeding Generation after generation breeds true to a single visible trait. Experiment o Cross two different parental generation plants (each One displays O ne version of the trait) o Parental white flower x purple flower cross them and plant the seeds to get the first generation
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o F1—First Filial (Latin for son/daughter) all purple 100%.
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