| TRD-package | Transmission Ratio Distortion | 
| find.maf | Find minor allele frequency (MAF) in case-trios, control-trios, or the whole sample. | 
| find.t | Find transmission ratio of minor alleles in mother, father or both parents. | 
| gcount | Calculate genotype counts (additive model) for selected population. | 
| ll | Fit Loglinear model with and without adjustment for TRD. | 
| prev | Calculate theoretical prevalence of disease | 
| rtrios | Generate simulated popoulation of case- and control-trios | 
| strata.cnt | Count trios for each of the 15/16 strata with mother-father-child genotypes MFC | 
| tdt | Compute TDT and adjusted TDT on case- and/or control-trios | 
| TRD | Transmission Ratio Distortion |