Outline03Lectures5-6 - BIS101-001/Engebrecht Spring 2010

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BIS101-001/Engebrecht Spring 2010 Outline03Lectures5-6: Allele and Gene Interactions Organisms and genes are complex. Different alleles of a single gene can result in different phenotypes. In addition, multiple genes interact resulting in unexpected phenotypic ratios. These allele and gene interactions can explain deviations from the expected Mendelian ratios. Reading in Chapter 6, 192-203 in 8 th edition or Chapter 6, 221-230 in the 9 th edition. I. Complementation = the production of a wild-type phenotype when two different mutations are combined in a diploid. a. complementation test = a way to determine if two mutations are in the same or different genes b. complementation group= collection of mutations that do not complement; therefore, they are in the same gene. II. Allele Interactions a. Incomplete dominance : Alleles with incomplete dominance will result in a partial phenotype in the F1, intermediate between the two homozygous alleles. However, in the F2 generation, both parental phenotypes will reappear.
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This note was uploaded on 07/02/2010 for the course BIS BIS 101 taught by Professor Sanders during the Spring '09 term at UC Davis.

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