In this video I go over an example problem of a three-point testcross. I provide the cross information and give the number of progeny with each phenotype. You have to determine the nonrecombinants, recombinants with a single crossover, and recombinants with a double crossover. You then determine recombination frequencies and make the gene map. Finally the double crossover interference is calculated via the coefficient of coincidence.
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Three-Point Testcross Example | Genetics
Теги
Gene mappinglinkage mappinggenetic mappinghow to make a genetic maplinked genesdouble crossoversingle crossoverrecombination frequencylimitations of genetic mappingmap unitthree point crossgene linkagethree-point testcrossthree-point testcross examplehow to do a three-point testcrosstips for three point testcrosstest crossgene mapping problemsmiddle genegenetic mapinterferencedouble crossover interferencecoefficient of coincidence