 Our package popper provides unique tools for analysis of data from clonal, admixt, mixed, and or sexual populations. Popper can be used for dominant slash codominant and haploid slash diploid genetic data. Data can be imported from several formats including GenLX formatted text files. This article was authored by Zhiyun N. Kambar, Javier F. Tabima, and Niklaus J. Grunwald.