LECTURE 5: LINKAGE AND GENETIC MAPPING Reading: Ch. 5, p. 113-131 Problems: Ch. 5, solved problems I, II; 5-2, 5-4, 5-5, 5.7 - 5.9, 5-12, 5-16a; 5-17 - 5-19, 5-21; Why are three point crosses important? •By solving a three point cross you can determine two important things: •order of the genes on a chromosome. GG303 Lab 3 9/5/07 1 Stephen Martel Lab3-1 University of Hawaii MAPS AND CROSS SECTIONS (I) I Main Topics A Three point problems B Rule of vees C Map interpretation Two Point Test Cross Mapping. or 246/7000 = 3.5% Map unit distance between the C,c and S,s loci = 3.5 Map Copyright Plant and Soil Sciences eLibrary 2017. Genetics, Division of Biological and Physical Sciences at Delta State University, Cleveland, MS. BIO 328 Genetics Genetic Linkage. • Example 3-point cross An example of a 3-point cross problem. Draw a map of these 3 genes (v, w, and z), showing the distances between all pairs of genes, and then calculate the value of Gene Mapping with a Three-Point Cross? Books and online show a table of the gamets combination of a three-point test cross.for example C,Sh, Bz and Genetic mapping and manipulation: Chapter 2-Two-point mapping with genetic markers * This chapter has been revised. See Publication History in side bar. Two- and Three-Point Test Cross Problems Answers. 1) Gene order: BAC or CAB; Distances: B-A=3cM, A-C=20cM (so, B-C=23cM); Coefficient Three Point Molly/Iron Cross Hybrid Strategy If a 4, 9, or 10 hits, proceed to play Three Point Molly. Example 1: A Pass Line bet is made and a 6 hits.
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