A dihybrid test cross gives 1000 offspring, of which 160 are recombinant types. What is the distance between the two genes?
Correct answer D. 16 map units
Explanation
Recombination frequency = recombinants ÷ total × 100 = 160 ÷ 1000 × 100 = 16%, and 1% recombination equals one map unit (centimorgan).
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