How to use the genetic map distance calculator
Convert recombinant offspring to map units. Enter recombinant offspring, total offspring in the fields above; the recombination frequency, map distance are computed instantly and plotted on the chart so you can see how the answer changes.
Formula
Variables
- r — Recombinant offspring
- t — Total offspring
Worked example
With recombinant offspring = 120, total offspring = 1000, the calculator gives recombination frequency ≈ 12 %; map distance ≈ 12 cM.
Frequently asked questions
What is the formula for the genetic map distance calculation?
Recombination frequency (%) = 100 × r / t. Map distance (cM) = [Recombination frequency]. Here r is recombinant offspring, t is total offspring.
What inputs do I need for the genetic map distance calculator?
You need recombinant offspring, total offspring. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use this calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.