chapter 3 - 1/31/2008 "Mendelian Genetics" Gregor Johann...

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1/31/2008 1 “Mendelian Genetics” Gregor Johann Mendel Monohybrid cross Dihybrid cross Trihybrid cross Rediscovery of Mendel’s work Independent assortment Probability and genetic events Evaluating genetic data-Chi square Mendelian Genetics Inherited characteristics are under the control of discrete particulate factors called genes that are transmitted from generation to generation on vehicles called chromosomes, according to rules first described by Gregor Mendel. The outcomes of crosses subject to these rules are affected by chance deviation and can be evaluated using statistical analysis. Quote of the Chapter You got to be careful if you don't know where you're going, because you might not get there. Yogi Berra
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1/31/2008 2 GREGOR MENDEL 1822-1884 Began breeding experiments with peas ( Pisum sativum ) in 1854. Published findings in 1865, but significance not realized until early 1900s Mendel’s Garden Mendel’s Pea Plants ( Pisum sativum )
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1/31/2008 3 Texture: Smooth vs Wrinkles peas 1. He chose the correct organism, the garden pea. 2. Chose traits that were controlled by single dominant genes. 3. Each trait was inherited independently. 4. He kept accurate and quantitative records. Why Did Mendel ? Traits studied by Mendel
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4 ASSUMPTIONS UNDERLYING MENDEL’S PRINCIPLES 1. Organism is diploid (peas) 2. Only two alleles at a locus 3. Complete dominance 4. Independent assortment of alleles (no linkage) 5. No interaction between loci Monohybrid Cross Mono (one trait) hybrid =a cross between two dissimilar parents. Crosses involve a single trait controlled by one gene with two alleles. Allele = alternate form of a
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This note was uploaded on 02/20/2008 for the course SORC 330 taught by Professor Brick during the Spring '08 term at Colorado State.

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chapter 3 - 1/31/2008 "Mendelian Genetics" Gregor Johann...

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