ANTH 18630 Lecture Notes - Lecture 5: Gamete, Allele, Meiosis
11 Sep 2018
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Document Summary
Darwin could not explain the mechanism by which parents passed on their traits to their offspring. Darwin could not explain how variation was maintained. Darwin could not explain how new variation arose. Gene: a segment of dna (that serves as the blueprint for a physical trait) Allele: an alternate form of a gene or trait. Combination of 2 alleles(genotype) determine the expression of a trait(phenotype) The idea that characteristics in the offspring are the result of blending the parents" characteristics together. Prediction: tall-stemmed plant * short-stemmed plant = medium- stemmed plant. Studied blending inheritance theory using common pea plant. Studied outcomes of crosses over the course of 7 years with 28,000 crosses of pea plants. Parent generation pure-breeding tall plant(tt) * pure- breeding short plant(tt) F2 generation tall(tt and tt) and short(tt) Mendel"s law of segregation: allele pairs separate/segregate during gamete formation and randomly unite at fertilization.
