FA2011lecture13

FA2011lecture13 - Example problem involving use of tables...

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Example problem involving use of tables to deduce recombination frequencies when looking at progeny of dihybrid X dihybrid: In tomato, the dominant allele O confers round fruits, and the recessive allele o confers elongate fruits when homozygous. At another locus, the dominant allele S confers a simple infloresence, and the recessive allele s confers a compound inflorescence when homozygous. A plant from a true- breeding round fruit, simple infloresence line was crossed to one from a true-breeding elongate fruit, compound infloresence line. Selfing of the F1 progeny gave the following F2 population: round fruit, simple infloresence (dom1, dom2) 129 (64.5%) elongate fruit, simple infloresence (rec2, dom2) 20 (10%) round fruit, compound inflorescence (dom1, rec2) 18 (9%) elongate fruit, compound infloresence (rec1, rec2) 33 (16.5%) What map distance between the the fruit shape and inflorescence architecture genes is indicated by these data? About 22 cM What is the arrangement of alleles in the F1 dihybrid?
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This note was uploaded on 01/16/2012 for the course BICD 100 taught by Professor Nehring during the Fall '08 term at UCSD.

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FA2011lecture13 - Example problem involving use of tables...

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