An experiment that was performed found the recombination frequency between two genes was 12.5%. What is the distance (in mapping units) between two genes?

• A. 25
• B. 6.25
• C. 12.5
• D. 10

Answer: (C)

Verified step by step guidance

1. Understand that recombination frequency is used to estimate the distance between genes on a chromosome. This frequency is expressed as a percentage.
2. Recall that 1% recombination frequency is equivalent to 1 map unit (or centimorgan, cM) in genetic mapping.
3. Given the recombination frequency of 12.5%, interpret this as the distance between the two genes in map units.
4. Convert the recombination frequency directly into map units, since 12.5% recombination frequency corresponds to 12.5 map units.
5. Conclude that the distance between the two genes is 12.5 map units, based on the recombination frequency provided.