# Frequency file description The frequency file contains a list of user defined haplotype or allele frequencies followed by multiple loci or a single locus to gene drop for generating the empirical null distribution. Each locus within a haplotype should match the sub-element **Locus** order in the .rgen file. The sum of the frequencies should equal 1.0. If you want to enter your own allele frequencies (eg., a multiallelic locus or biallelic locus), only a single marker should be defined in the sub-element **Locus** of the .rgen file, and the allele frequency sum should equal 1.0. [Home](index.html) [Haplotype Frequency Example File](data/PhasedPedigree.hap)