Biology 1002B Lecture Notes - Lecture 11: Earthbound, Mendelian Inheritance, Probability Distribution
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Tall person + small person = medium person: ex. But some purple parents were having red kids and blue kids?! Polygenic traits shown continuous variation in a population. Mendel: experimentation w/ controlled crosses & quantitative analysis (revolutionary: mendel only showed two alleles, led to an explanatory model . Variation in traits due to different alleles. Organisms inherit two alleles for each trait. Appearance of heterozygotes (phenotype) determined by dominant alleles. University connection: punnet square (pp x pp) and meiosis. Female"s are xx, male"s are xy: sex-linkage (f1, f2 generation progeny are different, ex. Question: the allele l in drosophila is recessive, sex-linked and lethal. Alleles of two genes assort independently in dihybrid crosses x la, lb, i: classic dihybrid ratio = 9, 3, 3, 1 (4 different kinds of gametes) Identify the parts and adjustments of the stereoscopic and compound microscope. Note how this distance changes when you change objectives from low to medium to high power.