Lecture 10 - Bio 121 Lecture 10 From Genotype to Phenotype:...

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Bio 121 Lecture 10 – From Genotype to Phenotype: Some Complications A. We don’t inherit characters. We inherit Genes. a. We don’t inherit moms blue eyes or dads brown hair. b. Inherit genes that have the potential for characters B. Interactions between alleles a. Dominance and recessive (see lecture 9) b. Incomplete dominance b.i. F1 hybrids have phenotype that intermediate b.i.1. Snapdragons b.i.1.a. Red – CrCr x white – cwcw b.i.1.b. Crcw – pink b.ii. F2 hybrids b.ii.1.a. 1 Red, 2pink, and 1white snapgradons b.ii.1.b. 1:2:1 phenotypic and genotypic ratio c. Multiple alleles c.i. Some genes exist in more than two alleic forms (more than two alleles for some genes) c.ii. Blood type c.ii.1. 3 alleles c.ii.1.a. Determine 4 different phenotypes (A,B, O, AB) c.ii.1.b. Determined by antigens – proteins on the surface c.ii.2. Ia, Ib, i c.ii.2.a. Ia, Ib are dominant over I, and codominant together c.ii.2.b. Code for different antigens on cell surface c.ii.3. Phenoype O – genotype – ii
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This note was uploaded on 03/12/2012 for the course BIO 121 taught by Professor Minchella during the Fall '10 term at Purdue University-West Lafayette.

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Lecture 10 - Bio 121 Lecture 10 From Genotype to Phenotype:...

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