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Lecture 2 posted - BIO 311D LECTURE 2 GENETICS Blending...

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BIO 311D LECTURE 2 GENETICS
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Blending inheritance model Large population of 20mph bunnies
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Add one 30mph bunny
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+ If blending inheritance happens… 30mph bunny 20mph bunny = 25mph bunnies
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Next generation… + 25mph bunny 20mph bunny = 22.5mph bunnies
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After 11 generations… 20.003mph bunnies + =
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Gregor Mendel Gregor Mendel Lived 1823-1884 Performed well in school To continue studies, entered Augustinian monastery and became a monk. Became an excellent botanist (plant biologist) Became interested in how inheritance worked Performed new experiments from 1857-1865 to deduce principles of inheritance in pea plants.
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Mendel’s experiments Mendel’s experiments Generation time. Heritable characteristics. Number of offspring produced. Performance of crosses. Captivity Cost
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Mendels peas
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Generations of Punnett square crosses: Parent - S = smooth seed, w = wrinkled seed Genotype – the genetic makeup Phenotype – the outside appearance Homozygous dominant – SS Homozygous recessive – ww
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Generations: Parent - SS = smooth seed, ww = wrinkled seed S w S w S w S w w w S S -- F1 Punnett square Offspring of parents
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