This page explains recombination frequencies in genetics, focusing on incomplete linkage between loci on a chromosome that are sufficiently spaced to allow crossover events during meiosis. It describe...This page explains recombination frequencies in genetics, focusing on incomplete linkage between loci on a chromosome that are sufficiently spaced to allow crossover events during meiosis. It describes how crossovers occur during prophase I through DNA exchange between non-sister chromatids, resulting in recombinant genotypes.