Enter the recessive q value and the dominant p value into the Heterozygous Frequency Calculator. The calculator will evaluate the Heterozygous Frequency. 

Heterozygous Frequency Formula

The following two example problems outline the steps and information needed to calculate the Heterozygous Frequency.

HF = 2*q*p


  • HF is the Heterozygous Frequency ( )
  • q is the recessive q value 
  • p is the dominant p value 

How to Calculate Heterozygous Frequency?

The following steps outline how to calculate the Heterozygous Frequency.

  1. First, determine the recessive q value. 
  2. Next, determine the dominant p value. 
  3. Next, gather the formula from above = HF = 2*q*p.
  4. Finally, calculate the Heterozygous Frequency.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

recessive q value = .2

dominant p value = .8

HF = 2*q*p = ?