4. Genetic Mapping and Linkage
Multiple Cross Overs and Interference
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3PRACTICE PROBLEM
In Drosophila, sepia eyes (se), curled wings (cu) and ebony body (e) are encoded by recessive genes found on chromosome 3. A researcher crosses se cu e/ + + + females with se cu e/ se cu e males and obtains the following progeny data:
Determine the coefficient of coincidence across this region when the frequency of crossing over is 22% for genes se and cu and 16.6% for genes cu and e.
In Drosophila, sepia eyes (se), curled wings (cu) and ebony body (e) are encoded by recessive genes found on chromosome 3. A researcher crosses se cu e/ + + + females with se cu e/ se cu e males and obtains the following progeny data:
Determine the coefficient of coincidence across this region when the frequency of crossing over is 22% for genes se and cu and 16.6% for genes cu and e.