Recombination frequency and map units
Two genes show a recombination frequency of 12% in a test cross. What is the map distance between them?
Answer B: explanation for every choice
A
This halves the recombination frequency.
B
Correct. A 1% recombination frequency equals 1 centimorgan (map unit).
C
This doubles the recombination frequency.
D
88% is the fraction of parental (nonrecombinant) offspring.
TakeawayRecombination frequency (%) = map distance (cM). It cannot exceed 50%.
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Reviewed 2026-11-05 by a medical student. Spot an error? Report it with question ID bb56.