BIOL 1010 Lecture Notes - Lecture 2: Punnett Square, X-Forwarded-For, Heredity
20 Aug 2018
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19th century: neology was dominated by the theory of evolution by natural selection. A population can change or evolve only if a variation of traits existed among its members. Variants from of the traits that enhanced survival and reproduction would increase in frequency with each generation, while the other variant of the trait would decrease and might eventually be eliminated from the population. Idea did not fit with the widely accepted theory at the time: blending. Genetic material mixes at fertilization- like blue and yellow paint to make green. Theory predicts that after a few generations all will form a uniform population of individual (we don"t see this in nature) Mendel experimented with the varieties of peas (during those times, they planted peas more than potatoes) Why he used peas as a genetic model: peas are easy to grow (barely need to plant them, a lot of variety within the peas that are easily distinguishable.
