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Ch. 5 - Genetic Linkage and Mapping in Eukaryotes

Chapter 5, Problem 17

The table given here lists the arrangement of alleles of linked genes in dihybrid organisms, the recombination frequency between the genes, and specific gamete genotypes. Using the information provided, determine the expected frequency of the listed gametes. Assume one map unit equals 1% recombination and, when three genes are involved, interference is zero.

Dihybrid           Recombination         Gamete
Genotype         Frequency                Genotype
A. DE/de           8%                           De
B. AD/ad           28%                          ad
C. DEF/def        E–F 24%                  dEf
                          D–E 8%
D. BdE/bDe       B–D 18%                 Bde
                          D–E 8%

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