BIOLOGY 13–

BIOLOGY 13– - BIOLOGY – Ch 12 7­15,...

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BIOLOGY –  Ch 12 7-15, 1-13.1/2 - Explanatory model: 3:1 phenotypic ratio from a monohybrid cross.  - Dominant alleles are those that specify the phenotype of a heterozygote - Not  due to any physical interaction between DNA of the two alleles - Results from the relative biomechanical activity of gene products.  - Nothing to do with the frequency of alleles - Incomplete dominance (one allele is unable to make enough protein to  compensate for the other) vs codominance (no dominance, both alleles  are expressed) - Case Report – woman has two sets of DNA   fused with twin in womb  “chimera” - Pedigree   men are squares, women are round. o Horizontal = mating, vertical = offspring o Shaded = subject of the study o Line through it   dead - probability: the randomness inherent in chromosome segregation at  meiosis, probablility theory allows us to predict the outcome of crosses
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This note was uploaded on 10/23/2008 for the course BIO 1222 taught by Professor Maxwell during the Spring '08 term at UWO.

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BIOLOGY 13– - BIOLOGY – Ch 12 7­15,...

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