Question

The percentage of recombination involving the seed shape and seed colour in a plant is 10%. What is the distance (mp) between the genes on a chromosome controlling these characters?

• A. 5
• B. 10
• C. 20
• D. 15

Answer 1

Answer: (B)

10

Recombination frequencies are directly proportional to the distance between the genes and therefore are used in linkage map preparation. Distance between two genes is measured in map unit. One map unit is equal to 1% recombination frequency and is also referred as centimorgan. In the question, percentage of recombination involving the seed shape and seed colour in a plant is 10% which means that they are present 10 map unit apart from each other. Correct option is B.