When studying the relationship of heterozygosity with recombination, it was noted that in mosaic genotypes, where homozygous and heterozygous regions alternate, local homozygosity is accompanied by an increased frequency of crossovers in neighboring heterozygous regions of chromosomes. This effect was first noticed in maize using morphological markers [2], and then confirmed in an experiment on Arabidopsis [3,4], where, due to use of molecular markers, it was shown that this effect (called the juxtaposition effect by the authors) is explained by the redistribution of crossovers from homozygous regions into neighboring heterozygous ones (remodelling in the author’s terms). We decided to test whether this explanation also applies to maize by analyzing primary data from Bauer et al. [1], where dense SNP mapping was used to construct recombination landscapes for 23 maize hybrids, and the families of DH lines obtained from each F1 hybrid served as mapping generations.